Situationships are hell

So I’ve been seeing this guy on and off for almost 2 years now. He’s hurt me many times and rejected me when I said I wanted a relationship. I still always end up hanging out with him , truly he’s my best friend. This last time we reconciled was after he had slept w my friend about 7 months ago. And through all this time he’s slept with many other girls. Hes a club owner and in that lifestyle so it’s just like whatever. I really worked on becoming detached and accepted that it would never be more than a friendship with some sex here and there. Mind you he’s the only guy I’ve slept w in 2 years. Recently we’ve been hanging out a lot. And this is kind of just normal I find when me and him are good we are inseparable however this time around I was really accepting of the fact that it’ll never be more than this. So I ended up seeing someone else and I slept with this new guy. First guy in 2 years. Honestly I felt weird after I thought about him during sex and I even had a dream about him after I fell asleep. It was kind of weird. I felt different. So the day after he messaged me and was like “we need to talk” so I’m like okay so I call him he asked me if I was w a guy last night I said yes, he asked me if I slept with him and I said yes. And he was livid. Like screaming on the phone saying how could I do this to him. And now all of a sudden he’s saying that he really wanted to establish a relationship with me after 2 years , yet he never said ANYTHJNG about how he felt. I asked him a week earlier why he never asks me if I’m seeing other people and he’s like well idk why should I ask. So I assumed that he didn’t care, just like he never cared or wanted something serious the last 2 years. But the only time he ever said something true about his feelings was when I had finally moved on w another guy. I’m devastated I feel like I did something wrong now. He’s saying that I chose another guy over him yet the whole time me and him have known eachother he always ends up choosing another girl and then eventually we come back together. There was no conversation about exclusivity, and after this long I gave up hope and genuinely accepted it’ll never be that. Now he’s saying he can’t look at me the same way, I know he’s obviously hurt but I just don’t know what to do I would fix it with him in a heartbeat if he REALLY chose to have a honest conversation about what he wants. But now I’m the bad guy after everything and it makes me feel so down. What should I do?