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, 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 breakup 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 have someone else I hope he always makes you happy But why did it have to be without me 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 breakup Breakup 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 breakup 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 breakup