The Chronicle of Higher Education, of all places, dropping the true science today:

People who indicated strong negative feelings about their ex in the immediate aftermath of the breakup were less likely to be depressed. The subjects were re-tested a month later, and those whose feelings had grown more negative also generally felt better….

I think this falls neatly into the category of “Things We Kind of Already Knew But It’s Nice that Science Has Confirmed Them.”

Yep.