She got a point tho.. He can't see anyone else, so how can she believe its not just because shes the only one he can see?
Also this deal is not really fair. She has to stay until he can see people again, but how does she know when he is cured? He could lie just to keep her around
That would be the typical obsessive male lead/Royalty character.
Well.. If she decides to leave, then lets hope he doesn't turn into a jerk like his father