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? 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'll 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?
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?