So I've been having this specific concern for over 5 months or so I believe and it is until today the day I will talk about it. Me and my boyfriend are in a committed relationship. I am 20 years old and he is 25. I am studying for an engineering title while he neither works nor studies. My sex life when I met him was normal I had sexual desires, but suddenly the idea of having sex with him makes me nervous, and even sometimes I feel repulsed over thiniking about it. I know its not normal for someone my age to avoid having sex all the time, but I insist the problem is with him due to the fact that I find myself fantasizing about other guys