Yep, Billy has no idea. He does wonder if the roles were reversed, if Tommy would want him coming back, too. He thinks the answer is yes, because friends.

Tommy's moving quicker into Billy's friendship books than his mind can keep up with. By the time he realizes it, it'd be too late to get him out of that spot without being an absolute asshole in an out of character way.

"You better fucking be. I'll go find someone to keep an eye on me while you go do superhero things." Billy flicks some goop off of his arm.