You chose wrong on some choices. To help you, here are some tips
- Before every choice, save.
- Listen to the affection sound after a few dialogues after choices. It is a hint. Otherwise, Load the save before the choice.
Jin needs a bit of persuasion earlier, something along the lines of wanting to visit him later.
But TLDR: If it shows END, it is a bad ending. If it says TO BE CONTINUED, then thats the end of the update