Do you think he's mad at me?

so there's this guy who i really like. he's unbelievably nice, cute, and has great eyes. and i think he might like me too. also, we're both into the same type of sports. we were playing one on one basketball the other day. and i accidentally elbowed him in the face when trying to block the ball. it was a hard hit, right away, i said oh my gosh are you ok!?? he said he was fine, but then for the rest of the night when i was at his house, he didn't really seem to want to talk to me. and he just went and sat down up in his room. i think it might of actually hurt him. i feel so bad. and for the past couple of days, he hasn't answered any of my texts. do you think he's number ok? and do you think he's mad at me? if he is, what do i do about it?