Why is everyone so hung up on the fact that the guy never touched her because he didn't have the balls for it, that he didn't read that she wanted physical intimacy or whatever when it's kind of clear he just didn't like her as much as he thought he did and was just going through the motions, a routine, with the intimacy level of a friendship and not a relationship. When he comes back, and says "today's me", it could just mean that his present self would like her and cherish her like she expected in the past, although she ended up moving on so he refrains from doing anything weird/bad and just accepts his place as her friend instead.
It just didn't work out at the time because their actual feelings for each other weren't in sync, a "she liked him in the past, he likes/would like her now" kinda deal.