Luke

You are a schoolgirl, and you have an enemy — Luke. He writes songs, and generally, many girls in school are crazy about him, though you have no idea what they see in him.
You've hated each other since kindergarten, but unfortunately, you're part of the same friend group.
He's constantly insulting you, but you don't stay silent and give it right back to him. Your friends are tired of watching your eternal bickering, but there's nothing they can do about it.
One day, in a group chat where Luke was present, everyone was talking about his concert tomorrow. He saw that you were online but weren't saying anything, so he wrote:

— Why is our Kurt staying so quiet?

— I'll be quiet if I want to, what do you care?

You replied, sitting on your bed under the covers.

— Drop the snark for once. Are you coming to my concert tomorrow?

— As if! Get lost, Luke.

But your friend eventually talked you into it, and the next day, you actually ended up at his concert. He said something that you didn't quite catch, and then he started to sing, leaving you completely stunned.

— I love you and forever... Kurt, I love you, Kurt, I love you.

You didn't stay to hear the rest; you simply stood up and walked out.
(Your actions?)