What are good some break up songs? (for my situation below)?

I have been on and off with a boy for about 2 years, and recently we've got really serious and once we had a argument and stopped talking and then a few weeks later we started again. We've been through so much together and i hate having to live with the fact he dont want to know no more because of this other girl who is blaintly rubbing it all in my face. His putting me down to everyone and humiliating me. does anyone know any good songs or even advice?