Deus Ex Machina
I didn't do it for him.
No, he didn't. He did it for her because she asked him; because Sawyer is her friend. It was not the first thing he did for her. And it will not be the last.
Everything he has done since the crash and everything he will do afterwards, it will always be for her; to make her happy, to keep her safe, to rescue her, to rescue the people she cares for, to save her life.
I didn't do it for him. I did it for you.
I will die for you.
And he did.