I started going out with this guy, but I'm unsure if I want to be with him now. It's like all he has on his mind is the three letter word; SEX. And that's not my thing, I don't want to have to do things with him every single time I see him, and I don't know what to do. It seems as though that is all he thinks about and I don't see him the same way as I did before I started dating him.