I have a friend who bad-mouths a very long term friend of hers when the girl is not around. I think it's due in large part to the fact that my friend's fiancee (sp?) doesn't like this girl, nor does her BFF. Yet, she goes out to dinner with this girl and spends time with her. It seems really passive-aggressive.

I really don't get it. If someone is your friend, be a friend. Don't smack talk her when you're around others who don't like her. I've stood up for this girl several times, reminding my friend that they've known each other for over a decade and it would be a shame to let that go to waste.

Sometimes people act like they never got out of middle school.