The fear doesn't go away, but some of it does kind of crumple into dismay. Loss, even. "No. It's. I don't know what truth is, anymore. I don't really exist? Except as some-- some fantasy?" (That's not true. You exist. Just. Now you're part of me, instead of part of this world.) "That's as good as not existing!"

(Buddy. Inside voice.) "Sorry, the other one-- he's talking." (They. WHATEVER! It's important, buddy. Not everyone is like you.)

He lets go of Steve to grind his palms into his eyes. (Hey. Maybe a hug will help. I think you can manage it. And Steve might need one, too.) He's not sure if he believes or trusts any of them, but he can't help but trust Steve. So he kind of topples forward and to one side until his forehead is on Steve's shoulder. Hug him, Steve.