This is the part I'm puzzled about, and evidently you are too: You say he knows you well enough to know that you are someone who would not enjoy yourself if he left you by yourself all night -- which makes me think that he was in the wrong and you that have every reason to be annoyed. But then you say that afterwards he "just didn't understand the problem," which makes me think that for whatever reason, he believed that you WOULD enjoy yourself if you stayed on stage. So either he doesn't know you as well as you thought he did (at least, in this particular aspect), or he thought there was something about this particular situation that was different than most. To me, it kind of boils down to what he was thinking at the time: If he genuinely believed that you would have a great time watching him spend the whole night on stage, then I can't blame him for doing so (or for not understanding why you were annoyed). He might have been incorrect in his assessment, but at least his heart was in the right place. On the other hand, it would obviously be douchie of him stay on stage all night if he knew that you wouldn't have a good time. Do you have any other insights about this based on your conversation in the car afterwards?