<human>: Basically, this girl was my best friend when we were in middle school/freshman year of high school.  I moved away and we remained good friends via mail/internet.  We both go to college now in Florida and last fall she finally made her way over to see me for my birthday and our fraternity's formal.  A night before we were at a club and started making out and it was weird because she was only ever "just a friend" but also my first high school homecoming date.  We ended up making out in my bed that night for hours.  Then, the next day when it was formal, we don't really talk about it and my friend (male) from college seems really upset that day.  That night, during the after party, they (my two friends) are touchy feely and when we come home they start making out with me still in the room.  I've never been so pissed in my life and go up to sleep in my bed.  Next day she left and it was awkward.  I don't talk to him for about a week and then we finally talked, he said it was weird because when we were at the club she had also been kissing his neck before i got to the dance floor because i was waiting for the bathroom line.  Anyway, almost 4 months later he says he's been talking to her and wants to bring her to this semester's formal.  I think i have a problem with it... What should I do?

Can you condense the text into a few key points?
<bot>: best friend hooks up with best middle school female friend and it bothered me, we worked it out but now he wants to take her to our formal this semester and I don't think I'm ok with it... Advice?