I've read threads about ISTJs and how they relate to people, but what do they want/LIKE in a romantic relationship?
E.g. Do ISTJs like doing coupley things like cuddling or reading, or would they rather have a solid practical things done FOR them?
Would they be happy to go along with non-goal-oriented activities? I once went out with an ISTJ who chatted with me as we walked randomly for over 2 hours, just because I thought it would be fun to walk on random streets to see where they led... was he clawing the walls inside?
Also, what sort of behaviour is the deal breaker in a relationship? The same ISTJ broke up with a gf not because anything huge happened... he said it was "just little things that struck and struck". I'm not entirely sure what that means. Is it more probable that she didn't consider him enough, or she didn't do enough?