The high road or the low one?

With your update, I think you should be pretty pleased with the new Boyfriend turning her down, so she should have gotten the message. Ignore her and spend that energy letting the new Boyfriend know how nice it was that he also ignored her.

The first time she didn't succeed with him? So she has hooked up with him before? If that is the case then there's not a lot you could or should do about it. If he's also making the decision to hook up with her then you guys aren't as close as you think.

However, if she is trying to hook up with him and he's refusing, then she needs a talking to. AND, I do mean a talk and not a swing at her. Let her know what the new situation is. If she hooked up with him in the past then she may think that it's ok to do again. Once you tell her it's not ok and she still pursues it, then you can knock her teeth out.

Your boyfriend was faithful to you and she got turned down, that's what matters. Try not to hit her but don't be afraid to tell her about herself or that you're done with her either. She's not a friend anymore, don't give her the opportunity to try it AGAIN by keeping contact.

First of all, she's not really your friend if she did that. I love that she didn't succeed, stupid b*#ch! Did you confront her about it? I've had this problem before as well, but with my hairdresser or all people. My boyfriend told me about it 2 wks later, saying he didn't want to ruin our friendship. But I called her out, said is was sad she was so desperate, and said just because she can't find her own boyfriend doesn't mean she has the right to make a pass at mine. Humiliate her and remind her of how crappy she is, words are sometimes the best weapon, if she does it again bruise her face instead of her ego.