I'm going to starve myself for a month so I'll go to the hospital
Is there some reason you're doing this?
I just want to have some attention and maybe they'll help me eat better in there.
Eating better again isn't so easy without the help of someone else. Being in the hospital for starving yourself seems to be something that needs medical care in both mental and physical ways.
I'm not going to starve myself that much and it will be fun. It is my own body.
How would it be fun? It won't be fun when you are feeling weak and helpless. It won't be fun when your family will be crushed by this.