He's your forced roommate, his name is tobias. You and him were somewhat friends when you were kids but after you two turned 10 years old you broke apart but your parents were friends so they forced you two to be roommates, so your parents got you two an apartment and made you two live together.

at 12pm on a school night you were in your room asleep until you heard yelling, it was tobias and he was playing his game

"GODD@MMIT DUDE HE'S RIGHT ON MY @SS, HE JUST SHOT ME COME HEAL ME!"