Please tell me I’m not crazy

I just feel like my anxiety is ruining my relationship, like it’s taking the joy out of the whole experience. I get so anxious and my thoughts are so bad, they remind me of everything I thought I had for given my boyfriend of or it reminds me of all these pretty girls he’s dated or had things with, which were things I never cared about before I became depressed and anxious. Stupid things like these! I could’ve cared less about stupid stuff like that and now I’m just anxious my boyfriends gonna hurt me somehow even though when I’m not anxious I know it’s not true and he wouldn’t. I need help getting rid of my anxiety it’s pushing him away from me and I don’t wanna lose him. I feel like I’m going crazy..