Black ops & boyfriend = wtf?

So my boyfriend was really into black ops since it came out, but i guess he said he recently prestiged and now hes playing against harder people i guess and not doing good at it anymore. So he decides that maybe if he lights up a joint..he can do better. He has been i guess trying to quit smoking and quit cutting down on weed too..but he gets all pissed off and completely takes it out on me. Last night, i guess we decided to play a bit together for fun..and i guess he did "terrible" (trust me..i did terrible) and then he started to act like a child and ignore me. When we went to bed, i asked him to sleep on his side cuz he was snoring, and he got up went and slept on the couch. we've been together for almost 5 years..and this is the first time he actually slept on the couch..we've had fights far worst than this and he always stayed in bed. This morning, i went into the living room to do my work..and he woke up, didnt say goodmorning and just walked to the bed to sleep. Even better..i spent all day cleaning the apartment and making him coffee and supper and he didnt say thank you for any of it. How can i go about talking to him about it without ignoring me? I swear I do 98% of the apartment work, and he spends 98% of his time watching tv and playing video games when hes home.