This guide is psychoeducational content. It does not replace a consultation. If your partner's jealousy comes with threats, violence, imposed surveillance or prohibitions, and if you are afraid, it is no longer just jealousy: read section 15 and our programme Coercive control: recognising it and getting free, and contact a specialist helpline in your country or, in immediate danger, the emergency services. If the conviction of being cheated on is unshakeable despite all evidence to the contrary, especially if it appeared recently, or with alcohol or drugs, a prompt medical assessment is needed: see section 14. If you are thinking about dying or harming yourself, call your doctor the same day. Allow thirty-five minutes to read.
1. Before you begin
He came home twenty minutes later than planned. She smiled at a message. An unknown name appeared on the screen. And the machine starts up: the scenarios, the racing heart, the questions asked in a falsely casual tone, then a less casual one. You check the phone while he's in the shower. You find nothing, and it doesn't reassure you: maybe he deleted it.
Or perhaps you are the one living with a jealous person. You justify every outing, you have stopped seeing certain friends to avoid scenes, and you are exhausted from proving a faithfulness you have never betrayed.
Three things, straight away.
Jealousy is a normal emotion. Almost everyone feels it at some point. It signals a fear: losing a relationship you care about. There is nothing shameful about it in itself.
The problem is not the emotion, but the room it takes up. When it occupies your thoughts for hours, pushes you to check, question, forbid, it damages the very relationship it wants to protect.
Invasive jealousy can be worked on. But not by finally obtaining definitive proof of the other's faithfulness: that proof does not exist, and looking for it feeds the problem. It is worked on by changing the way you respond to suspicions.
Who this guide is for
For you if you are jealous to the point of suffering, and want that to change.
For you if your partner is jealous, and you no longer know how to respond.
For couples who want to talk about it and move forward together.
It applies whatever the sex and orientation of the partners, and the type of relationship.
What this guide is not
It is not a guide for finding out whether your partner is cheating on you.
Nor is it an excuse for controlling behaviour. Being jealous does not give anyone the right to monitor, forbid, threaten or frighten.
How it is organised
Part I — Understanding (sections 2 to 6). What jealousy is, when it becomes invasive, where it comes from, the cycle that keeps it going, and what research says.
Part II — Working on your jealousy (sections 7 to 10). Observing, examining thoughts, reducing checking, tolerating uncertainty.
Part III — As a couple (sections 11 to 13). Talking about it, what the partner can do, and jealousy that has a real basis.
Part IV — Going further (sections 14 to 19). Particular forms, the shift into control, when to seek help, frequently asked questions, key points and sources.
2. What jealousy is
A mix of emotions
Jealousy is not a simple emotion. It mixes fear of loss, anger at the partner or the rival, humiliation, sadness, and often self-doubt: "what does she have that I don't?"
Jealousy and envy
The two are often confused. Envy is wanting what someone else has: a success, an appearance, a situation. Jealousy is fearing the loss of a relationship, or of part of the other's attention, to a third party. The two can mix, but they are not worked on in quite the same way.
Three dimensions
Researchers distinguish three dimensions of jealousy:
- Jealous thoughts: suspicions, scenarios, doubts about the other's faithfulness, sometimes without any evidence.
- The emotional reaction: the pain, anger or fear felt in response to a real threat — learning that your partner is flirting with someone, for example.
- Jealous behaviours: checking, searching, questioning, monitoring, following.
The emotional reaction to a real threat is a normal, even expected, response. It is mainly suspicious thoughts and checking behaviours that are associated with dissatisfaction and difficulties in the relationship.
What it is for
Evolutionary psychologists such as David Buss see jealousy as an ancient mechanism that helped our ancestors protect important bonds. It was long claimed that men were more sensitive to sexual infidelity and women to emotional infidelity; these differences are now debated, and seem to depend a great deal on how the question is asked. What is certain: jealousy has a function, and its alarm can sound far too loudly, or too often.
A continuum
- Ordinary jealousy, occasional, proportionate, which calms down when the situation is clarified.
- Invasive jealousy, anxious, which keeps coming back, feeds on minimal cues and does not calm down despite reassurance.
- Controlling jealousy, which works through prohibitions, surveillance, threats.
- Delusional jealousy, rare, in which the conviction of being cheated on is absolute and resists all evidence.
This guide is mainly about the second. It explains how to recognise the third and fourth, which call for a different response.
Frequently asked questions
Is it normal to be a bit jealous?
Yes. Occasional jealousy, proportionate to the situation, which calms down when things are clarified, is an ordinary emotion. It becomes a problem when it invades your thoughts, pushes you to check or control, and no longer calms down.
My partner refuses to show me their phone. Is that suspicious?
Not necessarily. Many people value a personal space without having anything to hide. If you have concrete elements that worry you, raise them directly. If they are doubts without evidence, checking would not reassure you for long.
I've been cheated on before. How can I not be suspicious of my new partner?
It is understandable that your alarm is more sensitive. Separate what comes from your history from what comes from the current relationship: what specific facts, in this relationship, justify your doubts? Tell your partner you are working on this mistrust, and avoid making them pay for what someone else did.
If I stop checking and they really are cheating?
Checking does not protect you from that risk; it adds permanent suffering to it. If clear facts emerge, you will be able to respond. Living under surveillance does not make you less vulnerable, only more unhappy.
Is my partner's jealousy proof that they love me?
No. It speaks of their fear of losing you, not the intensity of their love. And when it turns into surveillance or prohibitions, it is no longer proof of love but an attack on your freedom.
I'm jealous of my partner's friends, even her female friends. Can that be treated?
Yes. Jealousy can focus on any person or activity that seems to take part of the other's attention. The work is the same: spot the cycle, examine the thoughts, reduce checking and requests, and build a life that does not depend entirely on the relationship.
I'm jealous of my spouse's former partners, even though it ended years ago. What can I do?
This jealousy about the past often works like an obsessional doubt. Asking questions about those relationships, looking for photos or information keeps it going. The tools in this guide apply to it, and cognitive behavioural therapy can help if it persists.
My jealousy appeared suddenly, after sixty, when I'd never been jealous before. Is it serious?
New, intense jealousy, with a conviction that yields to no evidence, appearing late in life, calls for a prompt medical consultation: it may be the sign of an illness or a medication effect that can be treated.