Hi
I don't know you, and seems like evryone here is kind of clued into your situation, but I had a thought:

Without getting all into the why's of was it you? is it something else? etc. it does seem clear through his behavior that he is distancing you in some way. You don't have to freak out about it, but you shouldn't ignore it either. Maybe you could kind of give him some extra space for a little while and see where things go. If he's moving away from you, then trying to hold on can only hurt your situation. If he's on the fence, distance can really remind someone how much they like being with you.

my $.02