Most Helpful Girl
you've already taken the first step by removing her from your life. hopefully now that she's gone, you'll slowly stop thinking about her and dwelling on it.
What she did was horrible, and you have every right to be upset, but think of it this way- if you do something to attack her or make fun of her, then you end up looking like the bad guy. As long as you stay calm, she is the only one in the wrong.
Try other things to let go of your anger. go for a run. scream into a pillow. write a letter that you will never send. they sound silly, but they really can help.