Offriend

verb; to offend one's own friend or the friend of another.
noun; offrience

Julian: Alexander is my friend.
Ernest: I know you two are close, so I don't want to offriend him; but he has a dreadful fashion sense.

Isabelle: No offrience, but your pal Penelope has rotten teeth.
Jean: None taken, we are not BFFs anymore anyway.