Why do I get so jealous in relationships?

If you’ve experienced jealousy in relationships, it can be confusing, scary, and at times overwhelming to the point where you might question the relationship itself.

How do we shift from feeling warmth just by thinking about someone, to feeling highly anxious and physically unsettled a few days later when they’ve gone on a night out with friends without us?

Many people who experience this may draw conclusions like: “there’s something wrong with me.” Maybe you’ve tried to challenge your thoughts, build confidence, or reassure yourself, only to find yourself spiralling when a trigger for jealousy shows up.

This article will walk through why this happens, and what tends to help it shift over time.

What’s actually happening when jealousy shows up

Jealousy is a response to perceived or anticipated threats to a valued relationship (Buss, 2000; Sun et al., 2016).

It can be shaped by prior relational experience, including early attachment experiences and later relationship history. When it arises, you’ll often notice the reaction already there before you’ve had time to make sense of it.

In early life, we learn what to expect from relationships through repeated interactions.  Attachment research suggests that infants do not simply form bonds with caregivers; over time, they develop expectations about how those caregivers respond (Bowlby, 1969; Ainsworth et al., 1978).

This includes whether someone responds when we call out, how consistent that response is, and what happens when connection is strained.

Over time, these become what are called internal working models. Not necessarily conscious thoughts, but a kind of template which guides what we expect in relationships (Bowlby, 1969; Bretherton and Munholland, 2008):

• When I reach out for help, does someone respond?

• When something feels wrong, does it get repaired?

• Do I need to escalate to be noticed, or shut down to stay safe?

They function as learned expectations that shape how you perceive and respond in relationships (Collins and Read, 1994). This is why the same situation can lead to very different reactions in different people.

Why it feels so immediate and convincing

One of the most disorienting aspects of jealousy is how real and threatening it feels. Perhaps you notice a stimulus, your partner says they’re going out to a bar with friends, or you notice they’re texting someone and imagine it might be a romantic interest.

You might notice immediately the response in your body:

• a dropping in your chest and stomach

• tightness, nausea, or a surge of heat

• your attention then locking onto small details

Your mind then tries to make sense of what’s happening, often by filling in the gaps in the most threatening way.

In that moment, it doesn’t feel like a possibility, it feels like something is actually wrong.

You might find yourself doing things that don’t quite line up with how you normally think. checking, questioning, analysing. And later, when you look back on it, it can feel out of proportion.

From a neurobiological perspective, the brain is continuously evaluating cues related to safety and threat. Work in trauma research, including that of Ruth Lanius, shows when something is registered as threatening, the brain tends to prioritise safety-related processing (Lanius et al., 2010).

If something is registered as a potential threat, it becomes harder to pause, think clearly, or see the situation from more than one angle.

If your system doesn’t feel safe, thinking clearly about the situation becomes much harder.

This is part of why trying to “correct” the thought doesn’t always change the feeling.

What if something actually is wrong?

It’s also important to say that not all jealousy is misplaced.

In some situations, jealousy can point to something not being right in the relationship, rather than coming from your own internal patterns.

If a partner is consistently unreliable, secretive, crossing agreed boundaries, or there has been deception in the relationship, jealousy can be a signal that something isn’t right.

In those cases, the work is not about pushing the feeling away. It’s about taking it seriously and looking more closely at what is actually happening in the relationship.

At the same time, some people notice a different pattern, in that reactions feel out of proportion to what’s happening, or show up repeatedly across different relationships, even where there isn’t evidence of a problem.

In those situations, the response may be less about the current partner and more about what your system has learned to expect.

A helpful question can be:

• Does this feeling tend to arise in similar ways across different situations or relationships?

• Or is it closely linked to specific behaviours that would be concerning to most people?

This isn’t always easy to distinguish in the moment because the feeling itself can be very convincing either way.

But over time, looking at the broader pattern can help clarify whether the reaction is responding to something real in the relationship, or being shaped by expectations from earlier experience.

Why it often gets stronger when you care more

It can seem like jealousy means you’re insecure or lacking confidence, and while that can be true, it doesn’t fully explain why it tends to show up most strongly in our closest relationships.

As a relationship becomes more meaningful, there is more at stake. Expectations of closeness, loyalty, and connection become stronger, which can make the system more sensitive to anything that might threaten it (Sun et al., 2016).

Jealousy isn’t just driven by fear. It’s also linked to systems involved in attachment, motivation, and reward.

So there’s a kind of paradox:

The more you value the relationship, the more reactive your system can become to potential threat.

For some people, this can lead to a conclusion like:
“If I just cared less, this wouldn’t happen.”

There is some truth in that, in that caring less or creating distance can help reduce the intensity.

But it comes with a cost, because while holding back can protect you from the intensity, but it can also lead to avoiding relationships, or limiting the depth of connection you actually want. Close relationships play a central role in how we function and feel over time. Reducing emotional investment can reduce reactivity, but it can also reduce the sense of connection and satisfaction that you may be looking for.

Where change can happen

If early relationships have shaped an expectation that others won’t be there when you need them, it makes sense that this shows up later as jealousy, fear, or a sense of threat in close relationships.

The question then is how do these patterns actually change?

Research in attachment and trauma suggests that these internal working models are more flexible than they often feel. Longitudinal work, including the Minnesota Longitudinal Study, shows that while attachment patterns can be relatively stable, they are not fixed. A meaningful proportion of people shift over time, particularly in the context of later relationships and caregiving environments (Sroufe et al., 2005; Fraley, 2002).

Change doesn’t usually happen just by thinking differently about the situation.
It tends to come through repeated experiences of safety in relationship, especially in moments of strain, where you expect disconnection but are instead met, and the relationship remains (Schore, 2003).

These patterns tend to shift when the system expects one outcome, and a different outcome is experienced, particularly in emotionally meaningful or relational contexts.

For example, if your system expects that expressing need will lead to rejection, but instead you are met with care, this begins to register as new information.

This is why relationships become so central. They provide the conditions where these new experiences can occur.

Supportive relationships can offer repeated experiences of:

• feeling safe enough to express what you’re experiencing

• being met and regulated when things feel intense

• rupture and repair, rather than disconnection

Therapy can be one place where this is focused on more deliberately. By slowing reactions down in the moment, there is an opportunity for something different to happen, rather than the usual pattern automatically taking over.

In practice, this can look like:

• staying with the feeling, even briefly, without needing to get rid of it

• not immediately acting on the urge to check on our partner, accuse them, or withdraw

• having repeated experiences where the relationship remains intact, even when there is fear

If you experience jealousy that feels intense or out of proportion, it doesn’t necessarily mean something is wrong with you. It indicates a system that has learned to protect against the possibility of losing something important.

These patterns were shaped through experience, and they tend to change in the same way; through new experiences, often in relationship, where something different becomes possible.

References:

Sun, Y., Yu, H., Chen, J., Liang, J., Lu, L., Zhou, X. and Shi, J. (2016) ‘Neural substrates and behavioral profiles of romantic jealousy and its temporal dynamics’, Scientific Reports, 6, p. 27469. https://doi.org/10.1038/srep27469

Ainsworth, M.D.S., Blehar, M.C., Waters, E. and Wall, S. (1978) Patterns of Attachment: A Psychological Study of the Strange Situation. Hillsdale, NJ: Erlbaum.

Bowlby, J. (1969) Attachment and Loss: Volume I. Attachment. London: Hogarth Press.

Bretherton, I. and Munholland, K.A. (2008) ‘Internal working models in attachment relationships: Elaborating a central construct in attachment theory’, in Cassidy, J. and Shaver, P.R. (eds.) Handbook of Attachment: Theory, Research, and Clinical Applications. 2nd edn. New York: Guilford Press, pp. 102–127.

Buss, D.M. (2000). The Dangerous Passion: Why Jealousy Is as Necessary as Love and Sex. New York: Free Press.

Collins, N.L. and Read, S.J. (1994) ‘Cognitive representations of attachment: The structure and function of working models’, in Bartholomew, K. and Perlman, D. (eds.) Attachment Processes in Adulthood. London: Jessica Kingsley, pp. 53–90.

Fraley, R.C. (2002) ‘Attachment stability from infancy to adulthood: Meta-analysis and dynamic modeling of developmental mechanisms’, Personality and Social Psychology Review, 6(2), pp. 123–151.

Hesse, E. (2008) ‘The Adult Attachment Interview: Protocol, method of analysis, and empirical studies’, in Cassidy, J. and Shaver, P.R. (eds.) Handbook of Attachment: Theory, Research, and Clinical Applications. 2nd edn. New York: Guilford Press, pp. 552–598.

Lanius, R.A., Vermetten, E. and Pain, C. (eds.) (2010) The Impact of Early Life Trauma on Health and Disease: The Hidden Epidemic. Cambridge: Cambridge University Press.

Panksepp, J. (1998) Affective Neuroscience: The Foundations of Human and Animal Emotions. New York: Oxford University Press.

Schore, A.N. (2003) Affect Regulation and the Repair of the Self. New York: W.W. Norton.

Sroufe, L.A., Egeland, B., Carlson, E.A. and Collins, W.A. (2005) The Development of the Person: The Minnesota Study of Risk and Adaptation from Birth to Adulthood. New York: Guilford Press.

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