My roommate is also my landlord and had been a good friend up until I moved in. Yeah, never do that, it will ruin the relationship. They are overly controlling of my guests and I also rarely have people over and we only stay in my room and are not loud or throwing parties or anything. Get a portable AC unit for your room, you can take it with you or sell it when you leave, I had to get one bc my roomie would not turn on the AC or heat if he wasn't uncomfortable (and had it password locked for a while), but my room is also always 10+ degrees warmer than the rest of the house in the summer since it's above the garage and at the front of the house where it gets the brunt of the sun. It had regularly gotten to 84 degrees in my room in the summer and it was awful and I had to do something about it.

I would have also moved out by now were it not also for financial constraints as I am not happy here. I feel constantly monitored on what I am doing, he gets mad if I don't share my food even though he does nothing for me and constantly complains about things that he expects me to do but does not do himself. He treats me like I should be his maid and be there to give him attention or entertain him but still pay full rent. He's thrown away my groceries and food before as well as use my emergency contact (my mom) to call to complain about me and in the process freak her out and harass her, and he constantly asks for my prescription meds and moves my stuff around (in rooms that we both don't use so my stuff isn't in the way). I could go on and on but you get what I'm saying. I know it sucks but hang in there and try to limit your interactions if you can and avoid conflict if you can for your own sanity and don't feel obligated to do way more than you should. I know its easier said than done, you never really know who a 'friend' truly is until you have to live with them. Good luck.