All the BM posts are reminding me of the worst Bridezilla I've encountered: my old college roommate (not that you all are -- but it's BM related).
She asked me to be a BM. I had a knee-jerk reaction and said yes, but I had just gotten engaged 2 months before her and I immediately regretted the decision - especially knowing her personality. She's always been *extremely* domineering. So much so I swore off ever going out with her again unless it was just the two of us, after she invited me to a trivia night with her ex and she treated him so horribly in public with his friends.
Thankfully, she re-approached the subject of me being a BM (we're a few states apart), and said she had a "backup" if I couldn't, but that I was her first choice. I took the out and said I didn't feel I could give her the time or financial attention she deserved while planning my own. Right or wrong, I don't regret it. It's honestly a friendship I'm ready to let fade into the sunset. (Cont'd in comments)