He should not have gone to the cafe that Sunday.
He should not have sat next to her.
He should not have chatted with her.
He should not have been at the cafe again next week and seen her.
He should not have asked her out.
He should not have dated her.
He should not have fallen in love.
He should not have moved into her apartment.
He should not have seen her in the park with him that day.
He should not have fallen out of love with her.
He should not have stayed.
He should not have died at the hand of the girl in black.
But he did.