Ooh, let's all share which Polly columns we carry around printouts of. Mine is "These Tortured Intellectual Boys Are Torturing Me."
I think this Herd thing explains a lot of my workplace interactions...
A bit of perspective from one who's historically been on the broken-up-with side of the equation here. It sucks, epically, but sometimes it's a thing that has to be done. Just because you're the one who realizes that (or decides to act) first doesn't automatically make you an asshole. Just try to be nice and straightforward about it.