He'll keep. Everything does while we're here. We return as if we were never here at all, so anything he might need saving from won't change while you're parted from your world.

[ Someone more nihilistic might think that means that whatever happens here doesn't matter, but she's been here too long to think that. Everything they do matters to here, just not on their source worlds. ]

Hating that you lack control won't give you any power to change it. We're better making the best of the lives we have, while we have them.