Do they all cheat?

I want so badly to know if he ever cheated on me. He was always accusing me of cheating, going through my phone, suspicious of any man that was in my presence, bringing up my past, etc.

I know about projecting, and have always thought “a lot of times someone who is constantly accusing you of something, is actually doing that thing themselves.”

On the other hand, I can’t see him actually cheating. His father is a cheater though.

I can’t get it out of my head. I feel like it would be easier to move on if I just knew that he cheated.

Is it likely that he did? Does everyone with BPD typically cheat?