I need help

I was raped about 2 years ago by my ex. It's hard when no one understands. A part of me is scared to do things even a little sexual with the guy I am seeing because I am scared that if I was the way I was when I was raped that he might idk. I trust him 100% but I am scared. What should I do? (He knows about what has happened and he was scared to hurt me after that because my ex was also abusive)