At first I was a bit confused since I didn't understand why the boyfriend was so mad. But since you said that she was once a party girl and everything and how the boyfriend wants her to be perfect. I think I can understand why he was mad and why she was worried he'd be mad. He saw you passed out in the car and probably thought the two of you went out partying or something. He obviously doesn't trust her if he doesn't believe her when she says you hadn't been. She really needs to leave him. But oh well.