Stressing myself.

Am I the only person that randomly worries every so often about there relationship? Like I'll just think and go against everything I know and just worry that I'm not good enough. I'm not what he wants. That there are other girls. That he's being intimant with others. And that over all he just doesn't want me? But in reality I know I'm the only one I know he cares. Lol for some strange reason he wants me. And if he's not having sex with me he's not fucking anyone. But the thoughts that go through my head always over power the things I know. 😔 now in stressing myself out ready to cry.