Dating

Need help. It isn’t even a love triangle at this point. What am I supposed to do in this kind of situation?

I’ll start with ages.

I’m 18 turning 19 next winter.
She’s about to be 19. He’s about to be 19.

So, I have known a girl for awhile. Her and I have talked for around a year. She got a boyfriend a few weeks ago, and I wasn’t really aware. Him and I ended up close too, and we started talking casually. I already was close with her. I was aware that she cared about me, and he was making it quite clear that he cared now too. Now.. this is where it gets messy. They got into a huge argument, broke up, and the girl confessed her feelings to me. He has feelings for me as well. They’re fighting over me, and beefing in Instagram notes in a.. not very mature way. I don’t like situations like this, because I’m a very emotionally withdrawn guy in general. I quite literally do not understand what compelled them to decide to break up with eachother and catch feelings for me instead, but now I’m in a very awkward position, because they put eachother on block, and they each have been messaging repeatedly and informing me that they hate eachother, and that they’re glad I’m not like (insert the other person).

I don’t know how to handle this situation. I didn’t even realize that the guy was bisexual. I don’t understand why they broke up with eachother, and proceeded to catch feelings for me.
Yes I’m bisexual too, but it’s an awkward situation that I don’t know what to do about.

Also, I don't know if it’s relevant, but I’m an ENTP, and they’re both INTJs. (Just to give insight about their personalities, and the fact that they’re straight up BEEFING. It’s stressful.)

Need help. It isn’t even a love triangle at this point. What am I supposed to do in this kind of situation?
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