[Anatidae]

He might just want his own space? Living with someone can be tough for all parties involved. You're constantly around them and it can put a strain on any relationship. I know even in my family home I feel crowded and need my own space, so the same applies in a relationship scenario.

Also, if you don't play games he might feel it's better to keep his hobby and friends made through that hobby to himself.

I'd talk to him though. Explain your side and see if he'll give any clarification as to why he's acting this way.