We fool around, but then I feel bad. What should I do?

I'm totally confused about my relationship, where it's going, I mean. I'm 14 years old and I have a 16 year old boyfriend, he's turning 17 in a few months. Since he's older, I know he has more sexual feelings and things like that, but I don't think I understand completely. We always fool around...kind of sexually...but not completely. We haven't had sex yet, and I think he might want to....