a real bitch
A real bitch is a girl who doesn't give a damn about your feelings and won't betray you for no reason. She's always telling the truth, even when it hurts.
You said you'd never talk to her again. She said, 'I know. I don't care.'
She told your friend you were a fraud. Then she stood up for you when they tried to roast you.
She said, 'I don't need your drama. I got my own.'