Scared of my SO (long post)

The other night my SO and I got in a really bad for. He was hanging out with someone (we will call her Lola) knowing it made me really uncomfortable. Turns out they hung out again without telling me We got into the fight because I confronted him about it. He started screaming at me. We were at a show and security was watching so I tried to leave. He started cornering and holding me up against the wall. I got away and he was grabbing me but I kept wiggling away. He got ahold of me and yanked me down the stairs. I ran outside and he followed me and started cornering me again and holding me up against the wall. At this point I was crying and begging him to leave me alone. He followed me down the street and around the corner and kept screaming at me and crying hysterically. People on the street kept watching and it was so intense that people at a restaurant across the street were listening. A random passerby stayed most of the fight to make sure I stayed safe. That’s how bad it was. I’m surprised someone didn’t call the police. I kept crying and telling him to let me go and go away. He kept grabbing and me and forcing me to stay. Wrapping his arms completely around me and wouldn’t let me go. He started threatening to kill himself if I left. Which is the most manipulative thing ever. So I got pissed. I was begging him to calm down and stop yelling but he wouldn’t. I finally gave in because I was so done with fighting and being afraid. Turns out he was drunk but wouldn’t admit to it until the next day. I kept asking and he kept denying it and just saying he was so pissed at me.

I don’t know what to do now. This has never happened before. Nothing close to this. I don’t know if they fact he was drunk makes it better or worse. All I know is it was terrifying. He never laid hands on me but I was so scared he was going to. I’m afraid to make him mad now. I’m afraid to let him drink. I’m afraid he’s going to hang with Lola because now I think they’re just going to lie about it again. I don’t know what to do. We are engaged. We’re supposed to be moving across the country in 5 months. How do I move on from this? How do we get past this? It’s not easy to just up and leave. Like I said, this was the first time this has ever happened. This is the person I am supposed to marry.

*im sorry it was confusing. I tried to change to make it easier*