Welp, I'm three-for-three. Girl #3 told me just now that there's a lot of personal crap going on in her life and she has to put the breaks on things between us.
My intuition (or my NICKtuition as I call it) tells me she's being polite and letting me down without hurting me. Or she might be telling the truth and shit really is going on, which, hell I've been there.
I told her I understood and that, in the event she clears her head and we're both still single, that I'd be willing to give a second go. Told her I wouldn't wait for her or expect her to "come back," but if by happenstance we are, then I'd like to try again.
Still, kinda sucks. Of the three, I liked her the best and hate that it happened. Oh well.