[he shakes his head, still refusing to look at her or move closer, but his hands grip hers even tighter--as if he doesn't want to share his burdens, but still needs her presence and comfort. It's an extremely unfair response but he's so torn and conflicted]

I--I can't put all this on you. No more than I already have.

[he just barely keeps himself from saying 'you wouldn't understand'. He slumps even more, and sniffs]

Shouldn't have told you to begin with. It's ... it's not fair to you. It's ... I ... you don't have anything to hope for anymore ...

[and even if he weren't already choking on thick, painful emotion he'd have a hard time articulating this]