Trip gone terribly wrong

So over the last 5 days my boyfriend and I traveled to Punta Cana. We’ve been dating for about a year, I’m 27 he’s 28. We had a snorkeling excursion, which was for 3/4 of It, very fun. The last quarter of It my boyfriend went from being a 5/10 drunk to 10/10. It started when He jumped off the boat while we were on our way back to shore “to pee”. Then we get on shore, he’s now angry because I yelled at him asking why on earth would you jump off a boat. He takes out my juul (I know shame on me) and breaks It in half and throws It, then calls me a cun*t in front of everyone. I was and am mortified. I don’t engage in public fighting. Fast forward back at the hotel we’re continuing to argue till he eventually passes out. Next morning barley remembers. He drank mamajuana crap that I’m sure contributed to his blacking out. WTF do I do. We live together. Currently sitting next to him on the plane back 🙄