PPS - does he really have a 'right' to be angry?
I donno. That seems pretty harsh. If he CHOOSES to be angry, that's his freedom to choose. But saying he has a RIGHT to be angry seems to imply that somehow you did something wrong.
You didn't do anything wrong.
You recognized your own limitations and you listened to your voice in a way that protected you from very real potential harm. Sure, that meant you would miss his birthday party. That doesn't give him the any RIGHT over you. That doesn't make it acceptable that he be angry. Don't send yourself that message.
Wanna talk about rights? YOU have the right to protect yourself from being killed by alcohol.