Here's my current miserable situation:
Just got home from 4 months overseas to find out that the girl I love has started dating a friend and coworker of mine. Ouch. To recap, the girl in question is an ex who has somehow become one of my closest friends (mistake #1?). We have a very unique and close relationship that is obviously pretty rare for exes, but that we both really value. Since I've been home she's been almost too nice to me and we've hung out a lot just the two of us. (Which her current bf is somehow cool with? I sure wouldn't be.) I get the sense they're not very serious and I personally don't see it lasting very long, but I also can't really see him screwing it up... He's a nice guy, very similar to me (which of course just makes it sting even more).
So how do I react in this scenario? Obviously I'm feeling pretty hurt, jealous, bitter, etc... But I can't show that. I guess I just have to act cool and confident, pretend it doesn't bother me (it does), and try not to think about it (I can't stop thinking about it). I can't just cut her off... She lives down the street and my roommate is another of her best friends so I'll be seeing her all the time (this whole thing has a very Friends / Ross & Rachel vibe). Plus neither of us want that and it wouldn't do any good. Maybe just hang out with her less? Obviously dating someone else would be the way to go for now - she even wants that for me - but I can't just shake my feelings for her that easily. I feel pretty strongly that we are 'right' for each other in the long run. She's an incredible person, who unfortunately also happens to be a 24-year old girl who doesn't really know what she wants and who loves attention (and gets it).
Any other ideas?