i know you zone
This is when you're super into someone but they think you're just a weirdo who knows them. You're not even friends. You're like a background character who won't stop talking to them.
You know their favorite song but they don't know yours.
You text them and they say, 'I know you, I don't want to talk.'
You try to hang out and they say, 'I know you, I'm busy.'