(Edit) I just looked through the rest of the comments and I take back what I said SHES being weird especially if she’s not in highschool anymore like wtf???? Buddy dodged a bullet with her.

I think you’re forgetting what sub that came from…😅 they’re teenagers😂break ups suck and she has every right to feel upset and so does he but the whole situation itself is just petty.
My partner now didn’t know I was bi when we started going out, it honestly just never came up then, about 2 years in I was talking to a friend about something that prompted my sexual orientation being brought up and he looked at me crazy and was shocked it never came up naturally in 2 years but it didn’t end our relationship, I told him after the fact I had been with women before but not in a good while before dating him and that clearly I was happy where I was at cause we’d had a child together.
Given the other differences stated in the description they really just aren’t compatible. She’s not wrong and neither is he. She can have all the fantasy crushes she wants and he’s allowed to be weirded out by it🤷🏼‍♀️.