And like considering when the exes met she asked if he likes the younger and if they’re in contact, means they didn’t break up over it otherwise it would’ve been asked when breakup happened, I’m guessing she found him smoking cause she did say if he smoked again she’d break up, so basically he wasn’t dedicated to the relationship so they broke up,
Like he already had a spark of interest towards him the moment he started noticing the younger pulling away and ignoring him, but he didn’t even read the letters he got, they were just indicators to him that the younger is still serious about him, but he didn’t act towards it before breakup (which considering she was the one who initiated she has no right to want him back let alone kiss without consent) so he didn’t really do anything wrong they just… broke up
But anyway the one unique thing to me out of everything I read was how quickly the last scene’s misunderstanding was resolved and how a closed door and a “go away” did nothing, he just opened the door lmaoo
So basically cigarettes was their dedication to their relationships, he wasn’t willing to quit for the girlfriend in the first place, doesn’t matter that in words he was saying he was considering marrying her, he wasn’t serious about her
Then the younger guy picked up smoking as a step towards him and asked him to keep smoking to pick him and not her and he did
And while younger is in the army he quit to later get the younger guy to quit too as dedication to their new relationship