Why do I always think my girlfriend is cheating?

Persistent thoughts of a girlfriend cheating may stem from various issues such as insecurity, past trust issues, communication issues, personal anxiety, projection of personal problems, lack of trust, or external influences. Sometimes, personal issues or unresolved emotions are projected onto the relationship, causing distrust. Open communication with your partner can help address concerns, but if these thoughts persist and impact well-being, seeking professional guidance is advisable. A mental health professional can explore the root causes of insecurities, offer insights, and help develop healthy coping mechanisms for fostering trust and communication within the relationship. It's essential to differentiate between reasonable concerns and unfounded fears to maintain a balanced and healthy perspective.

It may be because of her actions. Whatever she is doing may imply that she is cheating. You could also be a bit paranoid about the situation, which can be normal. But whatever it is that is giving you the idea, I hope things work out. Your thought could very well be right as well.

You may feel the fear of loosing them causing paranoia. Learn to trust your partner and talk to them

Obviously you are in an unhealthy relationship. One of the foundations should be trust. If there is not that then you have nothing. Try talking it over with her

Probably because you lack a bit of open communication. communication between lovers is a very important thing.

You may be having trust issues, which you should talk to her about if you would like to continue on in a healthy relationship.

The two answers that immediately pop into my mind are 1) You feel that you are dishonest with her at times, and thus wonder if she's truthful with you all the time and or 2) You don't think you are enough for her, either because of something she has said, or done, or because of your own internal struggles.

Maybe you are just insecure that she is cheating on you, but maybe she is indeed you must clear your doubts first

Maybe you don't quite trust her. Think back and ask yourself if she has ever given you a reason to distrust her before and go from there. In said situations you do have options, but always remember to do what you believe is the best decision for you, not for others.

This is a natural feeling in a relationship. Trust is something that is cultivated with common effort. You can try to address the issue with your girlfriend, and start working from there. It takes some time, but try not to give up. Hope this helped :)