About a year ago I had my first sexual experience with a guy I didn't really know well. We fooled around and everything like that. We hung out for a few days and kept messing around. He told me he really liked me and I really liked him. But then he left town and wrote me really nasty letters about how stupid I was to have thought he really liked me and things like that. So this all resulted in me being afraid of being sexual with somebody again. In fact everything sexual is just completely repulsive to me and even makes me want to vomit sometimes. Seeing people show an interest in me sexually or even in other people makes me so uncomfortable I have to leave the room. I get so scared of it. Not of having my feelings hurt, but just of having sex. I only have once since then and that's because I was intoxicated. I don't know what to do. I really don't want to see a therapist. Is there any way to help myself?