Maybe he is just nervous and awkward. There are some guys(myself included) out there who only know how to like someone from afar, they just don't know how to act once they've confessed and especially not sure once they're feelings have been accepted. I reccomend trying to just be together alone for a bit to talk see what's on his mind. Of course this is just a reccomendation that may or may not work, its hard for me to tell since I don't know the guy. Hope this helps though, good luck. ^w^
