DAE have self issues in dating when it comes to intimacy?

For some background I am F20 and have anxiety and PTSD and have been dealing with it for years now by myself. I’ve been quite focused on myself and mainly just felt better being alone since I wouldn’t have any abandonment anxiety. I recently started dating a guy and mind you this is my first boyfriend. He’s very kind and i have known him prior to dating him. We have been going out for about a month but officially was his girlfriend a few weeks ago. I think it is going fast but we made our wants and needs pretty clear. We have been seeing each other a lot and been around each other very often and we have had a little bit of kissing and other contact that isn’t fully sex mainly because i’m not comfortable with it. We do get pretty passionate and sometimes I will get home and feel guilty and cry for no reason. I’m not sure why exactly because i really enjoy being with him and I like the way he makes me feel. I just have this ultimate fear every time it’s not good enough or that i’m grossing him out or he’s going to leave me. He’s been nothing but respectful and honestly makes me feel really good in the moment I just can’t get rid of this irrational fear. He expresses that he really enjoys being around me and doing things with me so. I feel alone in this because i can’t stop worrying something is wrong.