maybe you are a much bigger person than i am, but it would BE SO HARD for me to be cool with this person....but i guess a few questions b/4 i think she's a completely un-cool friend:
1-did she know about your situation while it was becoming non-romantic? (i realize you weren't friends until after the split....but did you talk to her while it was mellowing out?)
2-how long did it take her to tell you that she and him were moving in "that direction?"
not to sound bitchy or whatever, but....friend before or after the relationship wouldn't matter to me......i would never be able to go after one of my current friend's exes......no matter when she dated him....ESPECIALLY if i knew she was still coping with the split. that's just me, though, and i think it's awesome you can be open to both of these people in your lives being together.....shows who the
true friend is here in this situation. mad respect....
DEF toss the guy, though, he's not worth it. a very delicate issue you're having to deal with......good luck and don't get down!!! there's always something better!!!!!