Who are you?

You said, "Hi," like I was a stranger What is up with you? Haven't seen you, feels like a lifetime We were skipping school Sometimes you still show up in my mind And I hope that you're fine, I still do Now it's like I was never your friend How can you just pretend you don't mind? I guess that I know nothing about you Remember, we promised it'd only be us two Guess you forgot all the things that you told me Thought that I knew, now I don't have a clue Who are you? Who are you? Who are you? Some days, I still wish I could call you like I did back then And we could talk about how we're not like the others And we'd promise that we'd never ever gonna be like them Sometimes you still show up in my mind And I hope that you're fine, I still do Now it's like I was never your friend How can you just pretend you don't mind? I guess that I know nothing about you Remember, we promised it'd only be us two Guess you forgot all the things that you told me Thought that I knew, now I don't have a clue Who are you? Mm Am I stuck in the past? Thinking everything lasts What a fool I just blinked, you were gone Don't know where we went wrong Who are you?