What does she want??
I have been told by some T's to "not give that person your rage". Well, that is easier said than done, for me.
I get relief by throwing things...not to break them, just the physical acting of throwing helps me get it out. I used to scream & argue, but have stopped that.(that took a lot of effort)
If you like to walk or run or go to the gym...try that...let it out! Without harming yourself or anyone else.
I hope you feel a little better. Being betrayed as you have described is a bitter pill.