Well, I am no longer a bridesmaid, and, since we haven't spoken since, no longer a friend.
Work is a bit difficult, although we are both trying to remain professional. A couple of the mutual friends we had seem to have jumped my ship (the bride got to them fast) - I'm hearing rumblings about backstabbing, but I am trying to ignore it.
Thankfully, most of our friends are staying out of it, and I'm lucky enough to have some very old friends that I can always rely on.
You live and learn!