Help With my Boyfriend!!?

Ok we have been goin out for about 5 months now. We met over Xbox live. he only lives 2 1/2 hrs from me. hes 20 and im 17. Well sometimes he has a way of not wantin to talk to me. like ill just get to the point. last night he wasn't online all night. the night b 4 i didn't really get to talk to him that much. ( like 30 min) last night i saw one of his gamer tags was online and so i sent him an invite. he didn't accept. i checked his details and his main account was in the game with him. I asked him about it when i got on at 2 and he said that it wasn't him. (he don't let no one on that tag. not even me) then he would only answer like a few of my messages i sent him this mornin. its like he is avoiding me. i got mad when he wouldn't answer me and i sent him a message that said "Baby!?" and he said sorry he didn't answer that he was in a game. it was a half game and half lobbly. he said that the reason he didn't talk to me is because he was doin good in the games he was playin. is that an excuse to you guys. What should i tell him to get him to realize that i come before the games? what would you guys do if this were your BF. Serious answers only please. Thanks = )