I’ve come to realization, in my head, that I have trust issues!

For example, every time me and a guy start talking and I start to semi like him my guard goes fully up. It goes up and around my whole body about ten times till it’s fully secure. Then in my head I have things or scenario’s popping up like: he’s talking to this other girl, he don’t want me. He’s interested in her, so i’m being played. He don’t like me, i’m a bet. You know, ridiculous things like that! It get’s so annoying. I am literally fighting with myself like i’m in my own gosh darn relationship. Maybe that’s why i’m single. I can’t think straight or i’m over thinking. I need to get a grip. I need to take my own advice. I just need to really chill.