I really just dont know what to do about this..?

When my boyfriend and I first started dating 5 months ago, he kind of cheated on me. He was talking to 2 other girls in sexual ways, sending them dirty pics, telling them he wanted to be with them, etc. It hurt really bad and he did everything he could to keep me. He threw his cell phone away and everything. Things have been pretty good for 5 months, ups and downs like all relationships are. Well he wanted to go over his friends house today without me... for the first time. I still have a bit of trust issues and he knows this but he was reassuring that he was just gonna play some video games and watch tv and stuff. I was worried of course but I couldnt stop him. He told me numerous times that he would be home around 5 so we could have dinner together and spend our night together. I was on the phone with my best friend when my boyfriend walked in the door at 8:00. I am so hurt and confused and honestly I am straight up mad. He walks in and doesnt say a word to me. Goes to the bathroom, changes into sweat pants and lays on the couch. Im on the phone another 20 mins and I get off and hes kinda dozing off. I go into the bedroom and lay down. He comes in 2 minutes later to pee again then he says 'I put a movie in and I am hitting play if ur interested in watching' and he walked outta the room. So I go out there and sit down and watch this movie. He says nothing to me, doesnt hold my hand (he always does when we watch tv), no kiss, nothing. The movie ends and he gets up and puts another one in. Not a word to me, not even looking at me. I go into the bedroom and lay down again. He comes in and says 'im making tator tots, want any?' (in such a monotone voice) I said no thanks. He walks out. What is going on?! I get no explanation, hes acting like he is so furious with me. My friend tells me that hes mad at me cause I am mad at him. Huh? I dont know what to do. I really don't want to talk to him... it will just end up in a fight which neither of us want. I dont even have anything to say to him, and the fact that hes mad at me just makes me even more furious and confused. I think I am just gonna go lay in bed and cry and go to sleep, but what am I suppose to do tomorrow. Knowing him, he will probably act like nothing even happened, I will never get an explanation, or he will still be mad at me. I just need some advice and I dont wanna hear 'break up with him', or that hes cheating on me or hes on drugs or any of that nonsense please. Im just hurting inside and I dunno what to do. Like I said... I really dont want to talk to him, I think he should be the one talking to me. WHats going on here? Thanks