Just wow...😥

My fiancé and I have been fighting the last 2 days over something so stupid!! But it's really taking a toll on me. We were arguing (we were trying to talk it out but then it just blew up) and then he went to his friends for a little bit. His friends girlfriend was there (I've been getting close with her). He was bitching about me over there and then she came over. She told me that he said if I'm gone, I'm gone like it didn't even bother him if I just left and ended the relationship. I'm so upset right now. I don't know what to do. He just has it in his head of what he thinks I mean and will not listen to what I'm actually saying. Everyone I've talked to about has said that I'm right and he needs to just shut up and listen, his mom was one of them! He thinks he knows it all but he really doesn't. He keeps saying I've said things that I haven't said at all. But when his friends girlfriend came over and told me that, it really hurt me. Like I just feel like I should leave and give up. I'm tired of being the only one fighting for this relationship. I was trying to work things out tonight but he started in and it just went off. When he was gone, I was crying and I started cutting again and popped norco which I know is not good (I've had a previous addiction to pills and a bad history of cutting), especially for me. He's always been my rock and helped me through this but now it's like he's helped put me in this emotional state and I can't go to him to keep from doing it because he makes me feel like I'm wrong for feeling the way I feel. What should I do? It doesn't seem like he cares if I'm here or not😢😢😢😢