Be happy for him and be his friend. You are both very young. Maybe he just sees you as a friend, not as a potential girlfriend. He'll probably notice you if you start hanging out with other guys.
There is not much to do, you can be, you can be his friend, it's said, if you love something, let it free, if it comes back it's yours, if not... you know the rest..
OMG...I'VE BEEN THERE LIKE COUPLE MONTHS AGO BUT I GOT OVER IT BY NOW. :'( IT WAS SOME SAD SHITT...HE WAS A PLAYER AND HE TOLD ME HE WOULD DATE ME BUT I NEED TO ACCEPT THAT HE'S A PLAYER AND OF COURSE I AINT PLAYING NO SIDE CHICK GAMES SO I JUST REJECTED HIS OFFER ALTHOUGH I WANTED IT AS BAD..I REALLY DID LIKE HIM :(