1. Someone Calls You A Mean Girl To Your Face
Confrontation isn't something that everyone feels comfortable with, especially if it's with a best friend. Emotion normally gets the best of you and rationality becomes a long lost friend that you have no interest in seeing again for a while. You'll probably just call them a Mean Girl to their face, throw a piece of paper at them and then drive away. But you need to look at the events that have happened before this point to establish if you really did cross a line and break girl code.