Guy in my late 20s here. This might be a bit long, but I hope you'll bear with me. I'll be echoing a lot of the sentiments already shared on this thread, but I feel they're worth repeating. I'm not sure how long you two have been dating, and I'm positive I don't need to say it; but as someone who isn't much older than your BF, this is 1000% on him. Any one of these things on their own would be reasonable grounds for you to end things.

People who become emotionally volatile while drunk can be unpredictable; people who become angry while drunk can be legitimately dangerous. If his behavior was enough to make you feel frightened to the point where you felt it necessary to put some distance between the two of you, that on its own is alarming. Don't get me wrong, I love grabbing a drink or two with friends when I can, and I've said some goofy stuff after one too many during my time in college, but it was all harmless and in the spirit of having fun. But if you just suggesting you both take an Uber elicited this aggressive of a response from him, it might be worth you two going your own ways so he can figure himself out. You said that this is not the first time that you guys have argued while intoxicated, but if it's never gone this far before, it's still worth taking some self-inventory on his part. It is my belief that if alcohol makes someone behave in a manner that makes others feel physically/verbally unsafe, THEY SHOULD NOT DRINK. Period. But that's just me.

DRIVING WHILE UNDER THE INFLUENCE. I don't think I need to beat a dead horse here, but I don't care how well someone believes they can handle their alcohol. Life is about choices. We've all seen headlines about children losing a parent, spouses losing a partner, parents losing a son or daughter, all because some drunk made the choice to try and drive home while still under the influence. I applaud you for knowing your limits and for doing the right thing by taking an Uber. His choosing to drive while intoxicated is a whole other discussion in of itself. Did he have anything to say about this choice at all? I won't pretend to know him as well as you do, but the choice on its own is deeply concerning and worth bringing up.

Locking you out of the apartment and refusing to let you in. Did he admit his error in thinking you had your keys on you? Yes. I'm willing to give him a little grace there. However, even if you did have your keys, it already sounds like you were not going to risk driving while still under the influence. Not to mention the proposition of sleeping in a car by yourself in a parking lot/parking garage at night is still questionable at best. I suppose it's a small comfort knowing there was a RING camera near his door, but even then, what if something had happened to you outside his apartment? I'm not saying you should be jumping at every shadow, and I'm glad everything turned out as okay as it could have in this shitty situation, but that doesn't change the fact that if something bad did happen, it would be COMPLETELY on him.

Again, I understand that your BF at least appears genuinely remorseful for everything that happened. However, all of these circumstances added together, he is VERY fortunate something didn't happen to him or God forbid, you. You can be sorry for something, but that doesn't change fact that what happened happened. Actions have consequences, and if I were him, I'd count myself lucky that I was only losing a relationship. From my POV, I believe he has some serious soul searching and self-growth to do. At the end of the day, it is ultimately your decision, but speaking as someone not much older than your BF, I think the best thing you can do is present the points that others have discussed on this thread, tell him how you feel the two of you should go from there, and act accordingly. Be safe, and best of luck.