[He isn't able to read her perfectly all the time.]

Leia, his faith in you never wavered or he wouldn't have done what he did. Anyone who didn't love him would've had him arrested at best. Not to mention, he did what he did, in part, to keep you safe. Part of it was selfish, and you know him. He's impetuous, you're right, and impulsive. And he's dogged about keeping you save. The Queen Mother was planning to have you assassinated, and I know for certain that NRI had gotten wind of the plot.

Just...remember that Han's an idiot sometimes, but he does what he does for a good reason.