Desmond's quarters were on the opposite side of the estate from Leonor's.
As much as he wanted to keep her close to him, it was best to keep her far away. Sleeping was nearly impossible if he had to wear bandages that made his skin itch. He was always worried she was going to figure out who he was.
He hadn't yet decided if he would ever tell her. The way she responded to him made him believe it was best to close himself off. Valerio was as good as dead. The face she fell in love with was destroyed.
All that mattered was that she was out of the abusive situation her father had created.
After hearing from Stephano what he had witnessed soon after Valerio disappeared into the battlefield, it took everything in him to not put the man in his place when he faced him on his wedding day.
He didn't want to complicate things further for Leonor.