[Hiro shakes his head; it probably really is a good thing he's not actually looking at Tadashi, because it's already eating at him enough and he'd probably misinterpret that expression as more disappointment.]

I made a lot of mistakes. And screwed everything up in the process. And nearly got everybody killed. He was scared of Baymax because of me.

[He sniffs. If he cries now, he's going to be in a world of stuffy congestion hell ten times worse than the one he was already experiencing, so...fighting back the floodgates, best as he can when they've been building pressure for a few days now.

Yeah, the guilt and mental backflips trying to sort through all this was pretty bad, but admitting it out loud makes it so much more real and awful.]

This really is all my fault.