Unlike many stories here, you don't become a beast, you were just cursed with the fact that you could never leave the Forest or control your strength like a Beast.., you can even leave the castle but never pass to civilization.

He broke into your castle to save his father, and for some reason you trapped him and released his father who had also invaded your castle before.

"So can't go to the west wing, Why?" Benjamin said following you as you explain about the castle rules.