[ he's trying to not be sad all the time. Nico's right. he has an incentive to reach and if he wants to make Silena's presence permanent, or Luke's, then he has to be able to go out and hold some hands. seeing Annabeth's stuff everywhere, going through it, well, he's not getting anywhere like that. he figures it's worth a try to set it out of sight, even if the boxes aren't taped up. as if he expects her to show up again any time now. ]

You have mine. I doubt you want to get in my head more than you have to. Lots of weird stuff going on in there. You know how that is. [ he means monsters. ] Not that we have to worry about eavesdropping on our enemies here.