I'm going to fight with my friend
Why are you going to fight with your friend?
She was acting like I owe her something and I don't care about it.
Maybe you two can talk more about it and you can find out what she is talking about. It would be a shame to fight with a friend over a miscommunication.
Don't try to tell me not to fight, this is between me and her. We have to solve this now, so I'll fight her.
It would be wise to avoid conflict in your friendships when possible. Fighting with your friend can destroy the relationship.