He’s a bed hog

We have had multiple sleepovers before moving in together, I’m talking over 200 and it was never like this. Since we moved in for the first time, my bf keeps hogging the bed. He sleeps in the middle and either tries cuddling with me, rolls over to my side leaving me with a tiny space and feeling anxious I’m going to fall out of the bed not to mention having him as a wall blocking me gives off a lot of heat and makes me feel claustrophobic. If it’s not that, it’ll be just his legs to where he’s diagonal on the bed so I don’t get to put my legs all the way out. I can’t sleep like this at all. I work really long hours and I’ve become very cranky and resentful. I got a king sized comforter and that helped a lot with keeping me covered despite his movements but doesn’t solve the bed hogging. Getting a king sized mattress and sleeping in separate rooms are not options right now. I can get a body pillow but I feel like he’s just gonna plow through that and go on my side. Please someone help. It’s 4AM and I’m on this tiny ass couch cannot sleep while he gets to enjoy our nice bed I put together for us.