Goodnight is the hardest word

Night-time is hard. I spend all day every day with Dad at the moment and i find it really hard to say Goodnight to him. Even though he squeezes my fingers in his hand and tells me goodnight too. I don't like leaving him downstairs in the dark all alone, especially now he is so weak, skinny and confused. Worse still are the mornings. I know it is very possible sometime soon that i will go to wake him in the morning and not be able to.