Honestly he probably isn't interested in you and doesn't have the balls to tell you.
Also, I think the reason you're so hung up over it is that whole 'Want what I can't have' thing which is probably amplified by the fact that he just bolted and hasn't given you an explanation.
I'd say just forget him, move on... if he was interested he'd have gotten back to you by now. You'll find the right one, keep your chin up