Wasn't sure which topic to write in for this one, it's not necessarily a 'AIBU' so sorry about that...
I'm intrigued to know what you would do in this particular situation. Will try my best to explain as best I can and not drip feed!!!
If you had a very close friend who was upset by another friend (who you aren't mega close to but have known for many years) and you agreed that said friend has been very unreasonable to your close friend and are pretty pissed off on their behalf would you pull them up on it? Not necessarily in a 'you've been a dick' kind of way but a 'you've really upset .... the way you have acted' just so that she at least knows how her actions have caused a lot of upset (I've a feeling she is some what oblivious to how her actions or lack of have upset this friend).
Butt out or stick up for good friend?