When Sam says to Austin at the game what are あなた doing he says something I should have done along time ago. What does he mean によって this line. Did he know her from kindergarden and she had a thing for him. Im confused.
It means that he should have done it before. He didnt know he loved her but he now knows that he wishes he was different & have loved her from the start!!
He meant that when he found out that she is the Princeton Girl,he should have believed her as the person he chatteted and shared all his thoughts. He meant to tell her what he really felt like from the moment he fell for her.