Fix You by Coldplay

This is a good post-breakup song for several different reasons:

A. Coldplay is fucking wonderful.

B. The lyrics are kind of depressing, yet at the same time comforting.

C. Coldplay is fucking wonderful and I will windmill-kick you in the teeth if you disagree.

Bleeding Love by Leona Lewis

It's not really a breakup song, but it's something I've been listening to for a while. It has done its job fairly well.

Don't Stop Believin' by Journey

This is ALWAYS a good song to listen to, no matter what.