My boyfriend has seventh nerve paralysis, half of his face is frozen. I have trouble sleeping tonight, it's midnight, my eyes are only half closed

Suddenly in the dim light, I saw half of my bf's frozen face. It's... Smile? I swear his smile is disgusting. He reached out and stroked my hair, as if he didn't know I was still awake

"Twin brother. Everything that is yours is mine. Including this girl, why can only you live and I can't?"

He muttered while half of my bf face was still sleeping