Ok, I have this friend I've known about six years, and I'm hands-down the best friend she's got- she's not necessarily mine. And while I love her, she's crazy jealous of my other girlfriends. When I decided on my bridal party, she didn't make the cut, and now she's throwing a huge fit, threatening to get up during the ceremony and "take her rightful place" as my maid of honor. Not only would that really tick me off, but it would be incredibly offensive to my MoH. This chick really will make a huge scene, and the worst part is that I wasn't even INVITED to her wedding, or even told that she was getting married! I'm seriously considering asking her to not to attend.
How can I handle this diplomatically and still save the friendship?