That's it, I'm suing my ex-friend!
What? Why would you sue your ex-friend?
She gave me bad advice. I didn't know what to do, and she made it worse.
You should let it go and move on. There is no reason to get the courts involved even if you aren't friends anymore.
She made me mad and this is going to be the best way to get back at her.
I'm no lawyer, but I doubt you'd get anywhere suing her, but lose your own money. Moving on would be better for your mental health and your bank account.