friend and ex friend

[ImCoolBeans]

My best friend, who I've been best friends with for almost 10 years now and a friend who practically destroyed my reputation and set out to make me miserable for a year are all of the sudden talking all the time and what not. She's (my best friend) even saying how she thinks he's cute and that she would get with him. It makes me sick. The kid wanted nothing but me to be miserable. He spread all kinds of rumors, made so many things up about me, made people not want to talk to me or even be friends with me. This negatively affected me for so long but I recovered and got over it eventually. Now they're going to junior prom together and all I can say is that I'm hurt and upset. The thought makes me angry and disgusted among many other things. I don't know what to do or say about this. I don't know how she could do something like this after all that he's done to me. If I were in her situation I certainly would NOT be paling around with the douche bag and going to junior prom with him. I already have a date for semi too, but now I'm put in a situation where i need to be a part of his group for semi? This irritates the hell out of me and I'm fucking mad. I don't even know where to start with bringing this up to her. What should I say? (I don't want to say the wrong thing and have this turn into something between him and I)

[Contra]

I was kind of in the same situation a few years ago, when some guys who bullied me started hanging around with the girls in my class, who I hung around with too.
Well, if you're best friends you shouldn't have much reservations in talking to each other, but I understand what you mean when you say you don't know how to start the conversation.
When you talk to her you mustn't make her think you want to control her by telling her who she should be with, that will only makes things worse. Talk calmly and explain that you don't feel too comfortable that she is hanging around with your nemesis.
If you don't know how to start the conversation I'd suggest this "About what's-his-name, you have been a lot with him lately, haven't you? Well, I remember what he did to me and I don't really like him..." or something like that.
That's what I'd do. I wish you good luck. :)