I plan on cutting off a best friend over things she's done in my past.
Is there anything your friend could do to remedy the situation?
I'd like her to apologize. I'm going to write her a letter telling her that I want an apology from her.
If your friend has done something to hurt you and hasn't apologized, it might be best to just end the friendship. If she has not yet apologized then she probably isn't going to; and forcing an apology from her most likely won't make her feel genuinely sorry.
You're a bitch if you think my friend is bad. You don't deserve to live!
There is no need to be aggressive, as I was more so leaning on your side that if you feel insecure or wrong in the friendship you have the right to end it. If you would take some time and think about what was said, I think you'll start seeing things in a different light.