Sex with my roommate

So, I moved in with this guy about a month and a half ago after knowing each other for a small time. It seemed like a good idea even though we had sex twice and he doesn’t seem interested in a relationship....we were doing really well, no sex, no jealousy, nothing crazy. And then....we got drunk together. We ended up tearing each other’s clothes off and having AMAZING sex. We both made it clear that there would be no emotional attachment or connection just pure animal instinct. I was happy with it until two days later he invites some chick over and ended up staying for 36 hours. I was hurt to be honest like really hurt. I know I shouldn’t be but that shit was kind of cold. He’s now in a relationship with her but he also has a new chick every week over at the house. I’m over him because I know what I want, and that’s not a man who doesn’t know what he wants.