What should I do about this?

Last night, my friend and I got a little bit wasted, and we accidentally had sex. I was a virgin, and now I'm not sure how I feel about the situation. I remember it, but he was so belligerently hammered that he doesn't remember it at all.

Should I tell him about it, in case something happens and I am pregnant, or should I just tell him nothing and let it go back to being just friends?

The problem is that I'm in love with him, and I want nothing more than to be with him, so I don't know if telling him will make him want to commit or not. He had just gotten out of a really bad relationship and is going through a whole bunch of s*** right now, so he's not exactly in the relationship stage but he has told me he wants to date me.

Should I be honest, or should I risk it all?

Help!