My thoughts on hill , he doesn't like the palace and was always trapped there longing for freedom.
He also knows he and ml being together would bring issues and thus why he doesn't want to stay with him.
His dad used him to get a baby with the enemy and he was always a pawn .
I cant blame him for most of his actions.
But he was selfish and put himself first instead of his child.
So he basically choose his freedom and happiness over his child and ml.
Wise ml is always considering hill feelings and putting his feelings aside for hill.
(Thats what I'm seeing in current chapters )