In July I moved out of my parents place with a friend of mine. He's a niice guy but very lazy and doesn't clean up after himself at all. I knew all of this before we were roommates but underestimated these traits.

We're both almost 21. He works full-time as a dishwasher; it's the only job he's ever had. He constantly smokes weed (whenever he wakes up, gets home from work, before he goes to bed) and does nothing but work, play video games, and play guitar. He is an amazing guitar player.

He basically takes over our living room every day, gaming, smoking and ordering pizza/eating pretty shitty food all the time. He is always in there or for a few hours a day in his room playing guitar. As someone who has recently taken TRP (~a month) it is annoying to come home to such a slob, to have to clean up after him or live in filth, and to be somewhat forced to stay in my room when I'm home. I have been reluctant to bring friends/girls over because the living room is always totally disgusting and usually has a few fruit flies around.

I've tried to introduce certain RP theories to him to see what he'd think, and as expected he says stuff like "Wow man, not all guys are assholes like you." or "Dude, not AWALT." to which I have tried to explain the whole purpose behind generalizations and he just hamsters his way back to "Dude I get what you're saying, but not everyone is like that." He 'likes' a girl he works with who has ditched him a few times after they've made plans to hang out, and once or twice I tried to tell him she's wasting his time but gave up seeing as this just made him angry.

I tell him to do his dishes and do his part around the apt, clean the bathroom from time to time, throw out his shit when he makes food (like fucking single-slice cheese wrappers, he leaves that shit out for weeks before I get tired of seeing them and throw them out.) and he usually passive-aggressively nods or grunts and never does anything. I call him out on these bitch-grunts and he ends up agreeing but never takes action.

I've recently began treating him like a woman in certain aspects. This started as a little experiment/joke but since I have seen him slightly respond to this behavior I have kept it up. I can't move out for at least another 9-10 months so here I am asking for advice. Has anyone been in a similar situation? Is there any hope to get him to man up? Even slightly.

TL;DR: Slob, BP roommate, doesn't clean his shit, lazy, apathetic, niiice guy. Stuck with him for ~10 months. Can I change this behavior?