Getting over someone is a grieving process. You mourn the loss of the relationship and that's only expedited by 'Out of sight out of mind.' But when you walk outside and see them on a billboard or on TV or on the cover of a magazine it reopens the wound. It's a high-class problem but it's real.
What's that line from TS Eliot? To arrive at the place where you started but to know it for the first time. I'm able to write about a breakup from a different place. Same brokenness. Same rock-bottom. But a little more informed now I'm older. Thank God for growing up.