What the hell do I do?

I started dating my boyfriend 2 weeks ago and I keep feeling really guilty because I’m the only girl he’s done stuff with and I’m not as innocent as he is. I feel really bad because I love him and he hasn’t done anything with a girl or boy and I’ve messed about with boys. It doesn’t help that I was friends with benefits with a different guy before my current boyfriend. Is there something wrong with me for feeling this way. I feel like a complete slut. I’m also anorexic and bulimic and feel really bad if he buys me lunch or anything because I throw it back up and I just can’t help it.