Yeah, I think that´s it.
Especially the older you get, the more mature you get about things, of course. So that´s completely understandable.
It´s always nice to have your parents around and all but I think if he did move in with you now, it´d bother you, just bc like you say, you have gotten used to him not being around so much.
But it´s great that you got to enjoy his trip
