She may have been somehow offended at your wedding or at the fact she was expected to do a lot as your MOH and she didn't feel appreciated. All you can do is ask her what is wrong and how you can correct the situation so you can still be friends. Maybe her life has just gone in a different direction, and she assumes yours has as well, since you're now married. My granddaughter was to be her BFF's maid of honor, and then the bride's mother decided she didn't like my granddaughter's hair and that it wouldn't look good in the wedding pictures. Her dress had already been bought (over $300) and altered for the wedding and she couldn't return it. The bride let her mother dictate everything, and so now (several years later), the bride still won't speak to my granddaughter and vice versa. If your friend won't talk to you about how she feels about the situation, then you have your answer. The friendship is done.