His kingdom for a kiss upon your shoulder.

Waking up not together after a mission.

Xavier has a duty to Philos. He came here with a mission, a responsibility to his people. They'll die without the Aether core their planet needs.

But finding out it's housed in your chest makes him want to claim your heart in a very different way. It makes him long for something he'd long thought he'd given up on; waking up with someone he loves.