I don't want to have sex

Hi! I just really want to get this off my chest. I'm 17 and I've been in a relationship with my boyfriend for the past 3months. I come from a super sex positive city and school, where I feel like everyone is having sex. Not only am I not having sex, I have no interest in having sex in the near future or at all (and I feel like such a freak). I'm worried that when I go to college I'll be way behind everyone due to my lack of experience. I also worry that I'm messing things up with my bf as he has no interest being physical with me since we first started dating (when I told him I wanted to go slowly). Has anyone else experienced this?