So I may as well give a background story first:
I went out with this guy for a couple of months, and it was great but then there were rumours that he was saying things about me in the changing rooms and stuff so I dumped him.. but then a few weeks later he apologised majorly and asked me to take him back.. so I did and then everything was great, better than the time before, but one night we were out and we ended up fighting and breaking up again. And after this time I said to myself, right ill never get back together with him. But at a party a few weeks later, we did stuff.. we didn't have sex but I did stuff with him that I hadn't done with anyone else. But after that everyone said he had taken advantage of me, but he hadn't and I knew he hadn't so after this I really thought there was no more of him
but a few weeks ago we were out, and it was the first time we had really gotten on well since everything had happened and then he just stuck his lips on me.. and we made out for about 20seconds but then I pulled away because I thought I was being stupid.
that was maybe a month ago and still when I walk past him I get butterflies and if I'm walking through school I'll always look out for him. I mean, I've kissed people since him.. but it's never the same, I just feel so comfortable with him and I really want to go back to him.. because I must admit, we really did have chemistry when we were together and I still feel like there's some sparks and I'm afraid if I don't act on them now I'll regret it. But all my friends don't like him for what he put me through so I can't ask any of their advice but its driving me INSANE.. please help and sorry for such a long post.. =]

Dump him. Your friends are right. They can see things better from the outside looking in. You already have your doubts--which is a big warning sign. You don't want to date someone you cannot trust and shouldn't go to the next level. Sparks are just that sparks--hit and miss. They are not a sure thing and he is not either. Good relationships move slow and he is moving to fast for you. You seem like a nice person and you deserve better. The right guy will come around--don't take what is available or you will regret it in the long run. Relationships are based on communication, trust, getting to know the families, reliability (can you rely on him), truth, sharing, and caring. And then you have to test all those areas. It takes 9 months+ for the real person to emerge and you have already seen ugly in 2 months. Big warning sign to say run-immature. Let him grow up and see if he changes. Some never do they are who they are. You are right--you were being stupid. You're a smart girl. Hoping in bed with a stranger is the last thing you want to do because then you are even more attached. Save yourself for Mr. Right. Good Luck

I tend to agree with the previous poster, and think the physical attraction, is fueling the whole relationship. Take the time to see if it fades with time, and the chemistry is based more in compatibility, and not intense physical feelings. More talking, less making out.