Obsessive thoughts about boyfriend cheating

I'm not an expert, but I feel that this a "you" problem.

I feel that you aren't happy/confident with yourself and thus need your boyfriend to be with for most of the time.

Take some time apart. Immediately. If that means break up, so be it. If not for your own sake, than do it for his. You need to get your head together, and until you do, you are incapable of contributing towards a healthy relationship.

See a therapist; make sure they're trained in CBT (cognitive behavioral therapy). It's immensely helpful.

Also,
> lied to me about porn, nudes of exes, talking to his ex.

I would have dumped him a long time ago. He is almost certainly cheating on you or will cheat on you. Your paranoia seems to be founded on reality here; not paranoia at all. It's your brain trying to tell you he's fucking other women.

>>17195857
Agree with this.

All three of those things should be non-issue, except when he feels the need to lie. Porn may be embarrassment, but women who have nudes of exes have never hidden the fact from me, and talking to an ex should be completely non-issue if it's not a big deal.