Sexual remorse

I am 14 and for as long as I can remember I've  had issues with my sexuality. Anything sexual for some reason my mind seems wrong. All my friends have done something sexual to a certain extent, and I don't feel pressured or anything, I just feel like I need to overcome this. I was with my boyfriend last night and he was rubbing my leg and it got sort of intense, I immediately began crying. I don't know what's wrong with me and I need help.