I dont know what to do anymore... help

Me and my boyfriend have been together a year and a half now. This past month its been so hard... this is around the time his army brother committed suicide after getting back from a deployment. He always pushes me away. Well the past two weeks he wont sleep with me he always goes out to couch and plays games all night doesn't come to bed until like 6 am when I'm leaving for school. We barely talk or even hang out anymore I go to school basically all day 5 days a week. When I get home he says hi then goes back to playing his game leaving me alone. I have cried so much lately we dont have sex anymore. He never asks me how my day was he just has stopped putting in effort hed rather jack off all the time than have sex with me. I've tried talking about it and he says I've been moody and thats why he doesn't want to hang around me we live together. I give him his space but I'm sick of going to bed alone every night :/ he also seems to get mad at anything and everything. I go to school come home and cook and clean and theres no appreciation at all no thank you