Does he play the zombie killing game on Call of Duty? My SO has become addicted to that game and I flipped out tonight about it, threatening to throw the xbox off the balcony. After venting all of my frustrations in the whole world to him, we ended up compromising on one hour of play per day, and not past 7 pm.
After all that I kinda' get why he wants to hide away and do something that doesn't involve me. I'm insufferable right now.