Will gave an ugly bark of a laugh. "Apart from the fact that I blew up my life, left you all swinging in the wind and got myself caught by fucking Gisborne, of all people?"
He ran his hand down his face, over the rough stubble, wincing as his fingers caught the edge of the cut Guy had made. "I..."
He couldn't say it. Couldn't admit to Robin, of all people - Robin who trusted him and put weight on his judgement - how badly his own mind had turned on him, or how in the end he'd almost welcomed it.
"I lost myself for a while. Got my head messed up right and proper," Will said at last. Not a lie, but not the truth either, at least in the way Robin would take it. (Robin who saved your ungrateful skin, you pathetic coward.) But it was the best he could manage right now.