don't know what to do

So my current boyfriend and I go a ways back. We met in the summer time and right before school started we broke up. During the break up we both talked to other people and right when I started to move on he came back and I feel for him again which I have a bad habit of doing. Since then we have been together 5 months and lost our virginity to each other. When we first got together I was head over heals but I don't feel that way anymore. I feel as if he's just with me becuase I'll do sexual stuff with him and when I tell him I don't want to do stuff he continues to do whatever it is and it's getting bad for me to the point that I would rather be single. We have been through so much together that I feel like that is the only reason I'm holding on anymore but I know he wants us to last till marriage which I will say we are a few years away from. I don't know what to do. Any advice on if I should break up with him or what?