It's called a break-up because it's broken

the long version

Greg Behrendt knows that the one thing harder than realizing he's not that into you is finding the courage to walk away from the relationship. Complete with a workbook to help you put the crazy down on paper and not take it out into the world, this is a manual for getting over Mr. Wrong and reclaiming your inner Superfox. In the first few days or weeks after a breakup, you need to recognize that some things can't and shouldn't be fixed, especially that loser who dumped you or forced you to dump him. It's over for a reason, and deep down inside you probably know what that reason is. The goal is to help you turn your breakup into the event that changes your life for the better in ways you never dreamed possible.--From publisher description.