Well, if you really are over him, then tell him so. Don't be mean about it, just up front and honest. And as for if he is over you, I doubt he is. If he really had feelings for you, then it will take a LONG time for them to go away, if they ever do. That's something that you two will have to sit down and talk about. It's not going to be an easy conversation, and like the guy said earlier.. There may be no going back now. But, if you're honest, there is at least a chance for a mutual respect, even if you can't be friends afterward.