Sad or Maybe Secretly Happy

AB and I are still FB friends, so when his relationship status change came up, I being an ex, decided to check out who has officially come after me.  Hmmm... she's his ex-roommate for whom he had nothing good to say about to me, apparently her antics and drama where so outrageous /unbearable that he moved out.  The relationship actually does not at all surprise me.  AB has a thing for these kinds of women,  they came before me, so it is no surprise that they or she would come after. The question more for me is - so was I a moment of sanity or insanity for AB?  Was I the 30's something part of his brain, saying time to man up and get a girl who doesn't lie, cheat, starve because she doesn't have a stable job and parties all the time.  Or what I the experiment with on of those "straight-laced" kind, the rebel relationship equivalent for a  hipster?  Whatever I was, I am smirking, because honey your 30's may be the new 20's, in some respects, but it doesn't mean you should keep repeating the same mistakes.  Good luck AB, not sure whether to hope you don't get an STI or hope you knock her up and it straightens you out, or neither.  Let's go with neither and a splash of possible infection.