{{{hugs}}} for both of you - this part sucketh mightily. Even when you're the one to do the breaking, I've discovered, it still sucketh. I've had that myself - seeing an ex across campus, running into message board posts from someone I broke up with years and years ago - the weirdest, smallest things can trigger that unnameable whatever.

The closest I can come to a definition is regret for what never was - grieving over what might have been, had the fantasy in my mind been anywhere close to reality. I feel momentary pangs of wistfulness over what I wanted those relationships to be, and the disconnect between that and reality. I think that's normal, and I think it's permanent. It's just good, old fashioned *disappointment* and failed expectations, I think... heck, I get a very similar feeling flipping through a new DP9 book. :