My boyfriend strangled me in my sleep. What do I do now?

Me and my boyfriend have been dating for 1.5 years and have had a rocky past but have recently straightened things out and have been rebuilding our relationship. Things have been amazing. While on a family fishing trip and sleeping in the same room he reached over and put me in a choke hold for a good minute and a half. I was scratching him and hitting him to try and wake him up but he ended up not waking up until I nearly blacked out. After the fact my family came in to see why I was screaming and crying but the whole time he seemed very monotone and calm (shock maybe). He said he had a nightmare in which I said I was going to choke him until he dies and then choked me out in his dream. He did apologize after a while but he ended up leaving early from the fishing trip. Right now I asked him not to contact me because having such normal conversations with him was very triggering and I found myself very scared of him. He agreed 100% but initially said he wanted to try and solve his sleep problems naturally with melatonin, getting enough sleep and journaling ( he says he believes it was caused by him not getting enough sleep the night before and watching a scary movie before bed). I explained to him I didn’t feel comfortable at all with that and believed he needed help from a doctor. He agreed to go see one and is scheduled to see a doctor on September 9th. In the past I’ve urged him to go see a therapist or to talk to someone because he has some mental health issues and past trauma but I won’t go into that here. In the past he did end up getting on medication and talking to a therapist but stopped all treatment after 2 weeks. I’m really torn because I truly do love him and miss him but I’m still afraid it might happen again and that he won’t follow through with treatment. I do have a therapist and she does agree that what he did was horrible but I have to give it time to see how it all plays out. Friends say I should run for the hills, so again I’m torn. But as for now I’m just looking for outside advice and guidance.

Edit: I know there was a comment saying that people are making it seem like it was intentional so just to be 100% clear he does say that he was asleep when it happened and didn’t do it intentionally.

Edit: Thank you all so much for all your comments. Like some of you mentioned I really did know deep down that it wouldn’t last but I was too scared to do so. All your comments really gave me the confidence to put my safety first. I am fine and do not plan to see my now ex boyfriend ever again.