what she wanted was to put me aside for later. she wanted to be a slut, but she didn't want to break up. she wanted to go away on weekends, but she didn't want me to move out. and, when i got up and left, she couldn't compute what was happening.
she took me for granted.
and, i walked out on her.
...and then she came crawling back, and i told her 'no' - go be a slut if you want, but i don't want to be your partner if you insist on living that type of lifestyle.
but, this is absurdly silly, and outside of the scope of any meaningful discussion: we were still going on periodic catch-up dates more than five years later, and quite a while after we stopped being physical.
again: i'm still not fully certain what happened, but it's absolutely clear that it had nothing to do with the events around the initial break-up, because we were still friends for a very long time afterwards.