Why does my brother act like an imbecile?

he has huge issues, and he acts like an to me and has a huge grudge against me for no reason at all, i ask him a simple question like, "whats that?" then he responds rudly "go away", i respond "whats your problem" then he makes that ugly face "what are you talking about?" as rudely as he can be. i never talk to him and he never talks to me, and he thinks that just because i go on the ps3 on the weekends a lot he thinks i have no life? wtf, this is why i hate the teenage society and how it influences my brother, just because i go on a gaming console, on the flipping weekends, he thinks i have no life? somebody needs to slap him, honestly what am i going to do with that kid? :/ i'm out of options.