Edited sentence: " and decides not to quit.And that he's nothing without her.Example of this is when he returns after three months of captivity in Afghanistan and she has tears in her eyes at the sight of seeing him back.In a later scene, when she's about to quit due to an extremely risky situation he's dealing with, he tells her that she stood by him for years and that she didn't give up on him.It appears in the film that she really cares about him deeply and vice versa.She also seems to be so worried about him almost a lot.She responds by saying that,"You're all I have.Tony states in a scene with Pepper that he trusts her with his life