[He knows it isn't anger, knows Keith too well to mistake it for it-- knows so well how intensely Keith's emotions burn. All the same, his instinct is always to reassure him, holding him a little tighter.]
I know. [Of course you don't-- because you keep saving him.]
I'm sorry. [He looks pained as he says it and slowly, slowly the words I'm not worth saving start glowing brighter and brighter the more he focuses on it, despite trying not to focus on it, despite wanting to reassure Keith. He feels guilty, of course, that it's not working-- which only makes the words grow brighter, as if mocking.]
I'm sorry... [he says it again, softer, helplessly.] I've never-- talked about it.
[He knows you'd always disagree. Knows there's no way he'd ever convince you of it-- doesn't want to ever upset Keith like this. He knows it's true, at least-- not just Keith, but every person who's ever made a sacrifice for him, who's ever been hurt or killed or whatever else because of him--]