I want to confront this girl
Why do you want to confront her?
She's a stupid bitch for talking shit about me
Ideally, if you have a problem with this girl, you should work it out between the two of you. However, if she is criticizing you publicly, then you should stand up for yourself, and let her know that her behavior is unacceptable, or else others might start to believe her.
Fuck you.
I'm sorry if what I said offended you. I was simply saying that confrontation is not the best way to reach a happy solution. Instead of confronting her in an aggressive way, you should try and talk to her and see if there's a reason she's acting this way.