I'm following ADPiShannan's lead and looking to my sisters for some advice.
My bf and I have been dating for over 6 months now and he has 2 best friends he has known since he was 8. His friends Nick and Ed both have girlfriends: Stacy and Sara respectively (names have been changed to protect the innocent

). Both couples have been dating for over 3 years now and both girlfriends were very nice to me in the beginning of my relationship with my bf. Since then Sara and I get along really and the 2 of us have hung out a few times. Stacy started off really nice but 3 months after I met her, she did an entire 180. She would be blantantly rude to me, leave me out of conversations, ignore me completely, and just generally pretend that I was not there. I racked my brain at first trying to figure out when and how I wronged her but after awhile I realized it wasnt me. Other people such as Ed, Sara, and my own bf have noticed her general rudeness. I've been told that she's had a history of wanting to be the center of attention and right now I'm almost considered a threat!
This has all gotten to the point that I hate hanging out with her and Nick because I know it will not be fun for me. At the same time however I never want my bf to have to choose between his friends and me. Whenever I see her now, I'm generally cordial to her (using my sorority recruitment skills

but her behavior sometimes is enough to make my blood boil when I think about it. More than one person has told me that confronting her would do no good and thats just how Stacy is so just try to ignore...easier said than done! Anyway, I'm really at a lost what to do in this situation and really want to remedy it in some way just for my own state of mind if nothing else! I know you cant win everyone over and I'm fine if her and I are not BFF but it just frustrates me how much she makes people so uncomfortable with her antics.