Photo: Yale Center for British Art, Paul Mellon Collection
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"I am not inviting him to my birthday party."
Everybody wants to feel protected—especially when they've been dumped. Offering to full-on hate somebody's ex certainly lets her know that you're on her side. But hate is exhausting; hate sucks a lot of energy. Plus, it doesn't make rational sense if you never even met the ex. Instead, take the kind of loyal, immature path of kindergarteners all over the world and declare the offender crossed off your birthday list. Not only will it make that injured party in question laugh, but it also creates the pleasing fantasy of her drinking champagne and dancing on a table while the dumper sits home in front of the TV, crying over a carton of cold limp egg foo yung.