That isn't really the point; Billy just wants to know that Erik's told someone about it, and Xavier just seems the logical person, considering how close they are.

"I just meant..." Billy sighs and shifts his weight, aware how silly he's going to sound. "You don't have to keep things from everyone. And I know you don't want to tell me everything, but..." He trails off and shrugs, not sure where he'd been going with that train of thought.

"You can tell me stuff."