He is well aware of the fact that they don't remember anything when they return home. Which means they won't have any memories of the weddings. It's sad, but since they will have one there anyway, it makes it a little easier.

"You want to take this one home? But then wouldn't there be two? The one who shares your memories and the one that doesn't?" That seems complicated..but then what if the one without the memories goes back to their world and that makes the one with them no longer exist since he won't be there to actually experience them. This is way more thinking about uncertain things then he wants to do.

He shakes the thoughts away. Because going home also means that he won't get to see this Lan Wangji again. But if he can take that Wei Wuxian home..then perhaps the chance to move between worlds will open up to them like they had hoped.

"Well..what matters is the weddings here. Because that we can control."