probably just used you or doesn't respect you anymore for being too easy. sorry thats how some guys are
I can't speak for what he's thinking, but I can say that he has some serious issues. <br />
either he's afraid, or he got what he was after from you is what it boils down too. Only you can tell his motives because only you know him. Any assumptions at this point are void due to lack of information
He probably does care but his shame probably outweighs the care
Don't expect him to ever be any different
He must have regretted having sex with you. That's what happened to one of my girlfriends when she had sex her boyfriend became unresponsive after their first time.
he's just afraid he hurt you is all... he may be a bit concerned about it but it doesn't mean he cares for you personally