You feel a pang every time your partner laughs with someone else, you need to know where they are and who with, you check their phone in secret or you can't get out of your head the idea that they'll end up leaving you for someone else. If you recognize yourself in this, you're experiencing jealousy: a human, universal emotion that, in small doses, is normal, but that when it grows out of control can do a lot of harm to you and to your relationship. The good news is that jealousy can be understood and managed.
In this article I explain exactly what jealousy is, the difference between normal jealousy and pathological jealousy (morbid jealousy), its types, why it appears, how it affects a relationship and —above all— how to control it. According to the American Psychological Association, jealousy is a negative reaction to the perception that a valued relationship is threatened by a third person.
What is jealousy?
Jealousy is a complex emotion that mixes fear (of losing someone or something we value), anger (towards the supposed threat) and sadness. It appears when we perceive that a relationship that matters to us is in danger because of a third party, whether that threat is real or only imagined.
In small doses, jealousy is normal and even adaptive: it tells us that someone matters to us and moves us to care for the bond. The problem arrives when it becomes intense, frequent and disproportionate, and starts to dictate our behaviour. It's worth not confusing jealousy with envy: in envy we want something another person has, while in jealousy we're afraid of losing what is already ours.
Normal jealousy vs pathological jealousy (morbid jealousy)
Telling them apart is key. Normal jealousy is occasional, proportionate to the situation and can be talked about and regulated with communication and trust. Pathological jealousy —also called morbid jealousy— is obsessive and disproportionate: the person suspects constantly without any evidence, needs to control and check on their partner, makes repeated accusations and lives in permanent distress. Morbid jealousy can come to dominate the life of the person who experiences it and that of their partner, and usually needs professional help.
Types of jealousy
Not all jealousy is the same. These are the most common types:
- Jealousy in relationships: the best known, the fear that your partner feels attraction or affection for someone else. When intense, it's known as romantic or sexual jealousy.
- Retroactive jealousy: an obsession with a partner's romantic or sexual past, even though it's long over.
- Sibling jealousy: very common in childhood when a sibling arrives or because of the feeling of getting less attention.
- Jealousy in friendships: the fear of losing a friend or of not being important enough to them.
- Pathological jealousy (morbid jealousy): obsessive, baseless suspicions that generate control and constant suffering.
Jealousy in childhood and adolescence
Jealousy isn't exclusive to romantic relationships. In childhood it's very common when a sibling arrives, when there's a change at home or because of the feeling of getting less attention; it usually shows up as tantrums, regressions or constant demands for affection. In adolescence it appears mostly in friendships and first relationships. In general it's a normal stage of development, but when it's very intense or persistent it's worth supporting, sometimes with child therapy, so the child learns to manage it and to feel secure in their place.
Why does jealousy appear?
Jealousy doesn't come out of nowhere. It usually has its roots in a combination of factors: insecurity and low self-esteem (someone who doesn't value themselves constantly fears being replaced), the fear of abandonment, previous experiences of betrayal or infidelity, and an insecure attachment formed in childhood.
It can also be fuelled by emotional dependence: the more we depend on the other person to feel good, the more threatening any possibility of losing them seems. Understanding that jealousy speaks more about our own fears than about our partner's real behaviour is the first step to working on it.
How jealousy affects a relationship
When jealousy overflows, it erodes the relationship. It generates distrust, control, interrogations, recurring arguments and an emotional strain that exhausts both people. On top of that, it tends to trigger a self-fulfilling prophecy: the need to control and the constant accusations end up pushing the partner away, exactly what was most feared. Without working on it, jealousy can turn the bond into a toxic relationship in which both people suffer.
Signs that jealousy is a problem
These signs indicate that jealousy has stopped being healthy:
- Checking your partner's phone, messages or social media in secret.
- Needing to know where they are and who with at all times.
- Frequent accusations and reproaches without real evidence.
- Trying to limit the other person's friendships or personal space.
- Constant distress, anxiety or obsessive thoughts.
- Repeated arguments about the same topic.
Myths about jealousy
There are widespread beliefs that normalize jealousy and do harm. The first myth is that "jealousy is proof of love": in reality, jealousy speaks of one's own insecurity, not of the intensity of love. The second is that "a little jealousy is always healthy": small, occasional jealousy is normal, but turning it into control never is. And the third is that "if they're not jealous, they don't love you": healthy love is based on trust, not on the fear of losing the other person. Debunking these myths helps you avoid justifying controlling behaviour.
How to control jealousy
These steps help you manage jealousy and regain your calm:
- Recognize it without acting on impulse: feeling jealous doesn't force you to check the phone or interrogate; pause before reacting.
- Question your thoughts: distinguish between what you imagine and what has actually happened; jealousy inflates suspicions.
- Work on your self-esteem: the more secure you are of your worth, the less threat you'll see outside.
- Communicate without accusing: explain how you feel ("I feel insecure") instead of accusing ("I bet you like them").
- Build trust: trust is cultivated with time and transparency, not with control.
- Look after your own life: friendships, hobbies and projects of your own keep you from placing all your well-being in your partner.
Therapy for jealousy
When jealousy is intense or obsessive, psychological therapy is the most effective path to working on it. It lets you understand where it comes from, strengthen your self-esteem, break the obsessive thoughts and learn to trust. When jealousy is fuelled by betrayals or wounds from the past, techniques such as EMDR help process them.
It can be worked on individually or as a couple. In my practice I offer online couples therapy and individual support for jealousy and other couple problems, with online therapy in Spanish or Catalan, wherever you live.
When to seek professional help
If jealousy makes you suffer, leads you to control or check on your partner, generates constant arguments or you can't stop it no matter how hard you try, it's a good time to ask for help. Pathological jealousy or morbid jealousy, with obsessive suspicions and no evidence, requires professional assessment. Asking for help isn't a failure: it's the way to recover trust and calm.
If you recognize yourself in this, get in touch for a first assessment with no commitment. One important message: jealousy isn't proof of love, but a sign of an insecurity that can heal. Learning to trust makes loving stop hurting.