partner trouble

I’ve been dating my boyfriend for almost 5 years now. We moved in together a year ago and we’re both 21. He was talking a lot about marriage and stuff like that so I thought he was serious. A couple weeks ago he got really drunk and got obsessively jealous. We were at a bonfire with his friends and he just kept leaving me so I made friends with the girls there. His best friend came up to me and wanted to talk about something someone had told him so we were talking about it and my boyfriend came out and was instantly filled with rage. He told me we needed to leave so i went with him. In the car, he started yelling at me and cussing, saying that I was disrespecting our relationship because he thought we were being too friendly by just talking. I couldn’t even explain to him what was going on because he kept telling me to ‘shut the F*** up.’ I feel stuck because we live together but I do not want to be married to someone who acts like that out of nowhere. And no, it is not the first time this has happened. Will things ever change? I’m not sure. What the heck do I do