Everyone at school thought we were sisters

Dressed the same, talked the same, together all the time

You could find me in your family pictures

Next to you, in the frame, but you moved on and I'm replaced

I only wanted you to be happy

But I never thought it'd be without me

Oh-oh, now you don't know me at all

You left with no warning

Always thought that it'd be love

That was gonna mess me up

Didn't think it'd hurt this much

When best friends break up

You don't even seem upset about it

Guess I'm the one who lost the things you had all the time

You seem like you're cool with or without it

'Cause you put me through hell just to have someone else

I hope he always makes you happy

But why did it have to be without me?

Oh-oh, now you don't know me at all

You left with no warning

Always thought that it'd be love

That was gonna mess me up

Didn't think it'd hurt this much

When best friends break up, break up

I just always thought that it'd be love

That was gonna mess me up

Didn't think it'd hurt this much

When best friends break up

Oh-oh, now you don't know me at all

You left with no warning

Always thought that it'd be love

That was gonna mess me up

Didn't think it'd hurt this much

When best friends break up