… to friends:
1. Backbite them.
2. Stab them in the back and plan awful things while they go around thinking that you two are still good and doing well.
3. Talk about them in mean ways to other people.
#3 is not for the friend’s benefit. It just looks bad to others if you are heard saying weird stuff about your friends.
What to do:
TALK to your friend.
ASK him/her about issues and problems.
CONFRONT her/him in a civil way and don’t say “whatever” in the middle of a discussion just because you have nothing intelligent to say.
And that’s my final word on the matter. 🙂