As I'm planning my wedding, my MOH (best friend of 10 years) is making things rather difficult. She tries to overrules what I find acceptable and thinks that my and my fiance's day is all about her. She wants to wear 4 in stilletos and dresses that I find unacceptable due to conservativeness of my guests. I do not want her wearing heels over 2 inches and I should have the last say in the dresses due to conservativeness. When I try to talk about things that we need to do, she changes the subject to her and her new boyfriend. Please help me on how to addres this without causing a rift.