Songs about letting go forever?

I want a song that saying that you just wasted your time or something like that- NO EMO SONGS pls..no offense..I just don't like them that much..and take note I'm a girl so yeahh & I never had that guy I just liked him but I know he'll never like me so yeahh but no hate songs like Kelly Clarkson Since U been Gone or any of that kinda stuff...thx. :)