Answer:
I am the kind of nut that is empty at the center and has no shell.
I'm many people's favorite place even though many don't remember their stay. You'll love to come but hate to leave if you get cold use my sleeves.
What has to be broken before you can use it?
I am a type of cheese made backwards
I have Eighty-eight keys but cannot open a single door.
Give it food and it will live, give it water and it will die.