6. It Makes You Angry
A little self-righteous anger can do wonders for your confidence. Yell it in your apartment, or scrawl it out in your journals, but just get it out. Maybe it sounds something like "You are so stupid, ex, you don't know what you lost! You're missing out on the best thing that ever happened to you! I am way too awesome to ever get dumped!" Preach. Who has the nerve to do you wrong? You ex, that's who! Speak on it until you feel better. You'll get a nice boost.