my BPDstbxw certainly had a good memory. she also certainly had a big problem with my good memory.
from the OP:
Like "six months ago, two Thursday nights in a row, we went to the same restaurant, I was mad about that." Instead of just saying at the time, let's go to a different restaurant.
this habit, of not saying a thing at the time she was feeling it, was the beginning of the end for us i think, and it came as soon as the marriage started. i can't remember exactly what the issue was but:
me: dear, could you tidy up this mess (you left) on the counter (a thing you do every day)?
she: well it's just this one time (see above) and two weeks ago you didn't put your shoes on the shoe tree (or whatever)!
and she was probably right. but 1: she wouldn't engage with my issue, and 2: she wasn't speaking from out of her emotions when she was having them. i took her in my arms (i actually remember this) and gave her my sincerest assurances that i was the guy she could say anything to, good bad or indifferent, and never have to worry. you'd think this is just what a partner would want to hear, but not she. my assurance never took, and i became increasingly frustrated by her reticence and backbiting and that was a bad mistake.
i knew it was a problem as soon as i heard it, because what kind of a marriage is it if your spouse won't communicate? but i didn't know how big a problem it would turn to be, as she only once indicated explicitly that she was having real issues in the marriage, one meticulously and callously deceitful month before announcing her exit affair and bolting (during which announcement she said "i always thought you would be the one to leave", a classic BPD projection). i suppose this refusal to speak was out of fear of contradiction and hence being found fault with, or that i'd be offended and leave (over being asked to hang up my shoes?).
here i go into woulda shoulda ... .if i'd just made a practice of buttoning my lip and cleaning up after her would she have been happier and we still together? the T (who knows BPD) emphasizes 'no' because there would always be another demand or another desire hidden. maybe she's right. i also didn't like being treated like a servant.