sex??? or abuse????

me and my boyfriend met a couple of months ago and in the beginning i really liked him. now, however, i dont like him as much because he isn't as aggressive as i like. anything i say goes with him. but i dont want to just break it off with him because i know that he really cares about me a lot. also. his sex isn't good either. when he gives me head it feels like he's trying to bite my clit off.  any suggestions?