Hal knew the workings of the Teleportation circle more than well enough to get it to take him where he wanted to go... He had already stepped on it and was preparing to activate it when Aliya's brain finally clicked to what he was doing.
He was leaving...
He got her all hot and bothered and now he was leaving...
A part of her was glad to finally see him leave as that would put an end to any further inappropriate attempts to touch or kiss her but another part wanted him to stay.
No part of Hal wanted to stay enough...
He had anchors in the Arkene Duchy capital now and could return whenever he wished and however fast as he wanted.
Also, he believed he and Aliya would meet again even if he never returned to the Arkene Duchy and he was right...