74. Know when you are in his "back pocket"

It can be anything from an ex IMing telling you that a poem he found written by you made him smile while cleaning out his CFA stuff, or a boy you dated a couple quarters ago calling to see if your free for a drink, or texting just to say Hi - either way, he's likely checking in to make sure you don't hate him so he can hook up with you should things not workout with his current situation.