Problems with an ex..?

So there's a guy I met at the beginning of summer '08. We hit it off and started dating about a week later. The relationship lasted two months, ending in three weeks of bitter fighting. After the breakup, we went three weeks without a word to each other. He got home from vacation and we saw each other at school..

He just looked at me as I walked out of the building after class and asked if he could get a hug.. I wasn't completely over him so I did, and now, three months after that incident, we're closer than we ever were when we had dated. Ninety percent of our school thinks we're dating, and even some of our close friends don't believe us when we say we're not. There's an obvious physical attraction, and when we're alone together well.. Maybe we forget we broke up in August.

I've hinted at wanting to date again, but either he's to dense to understand my subtle hints, or is ignoring them. We act like we're together but there's no commitment.

Honestly, I love the kid to death and a mutual friend of ours told me that he bawled like a baby after the breakup because he lost the love of his life (me). The friend also told me recently that my ex still feels the love we shared.

I can't tell though if he wants a relationship, but I don't want to make things awkward by asking him if he wants a commitment if he says no. I'm perfectly fine with the way things are now, I'd just love to be able to say "yes" on the several occasions per day that I am asked if we're officially together.

I want to be with him more than anything, but I don't want to risk the relationship I have with him now to get it. I don't know what to do...