If you bury the pain deep down it will stay with you indefinitely, but if you open yourself to it, experience it, and deal with it head-on, you'll find it begins to move on after a while.
Greg Behrendt, Amiira Ruotola-Behrendt (2005). “It's Called a Breakup Because It's Broken: The Smart Girl's Break-Up Buddy”, p.71, Harmony