I'm going to talk behind my friend's back after what she put me through.
What did your friend do that upset you so much which made you want to talk behind her back now?
I'm just pissed that she made a decision for me when I was in a bad position without asking me first.
To be put through so much by a supposed friend is really disheartening, friends are supposed to have each other's backs. Revenge is not the answer, it just manifests things and gets people even more angrier. Talking behind their back will make others wonder if you talk about them also.
Fuck. Fine I'll leave it alone.
I'm not saying you should leave it alone, just that talking behind their back isn't going to solve anything. I think you should have a discussion with your friend and let them know why you feel hurt. I'm sure once they realize how you feel then they'll try to make it right.