I'm happy that a family member is dying.
That's horrible. Why would you be happy that someone is dying?
He is a very rude and mean person and I try to stay away from him.
It is okay to not like someone.  However, it is no good form to be gleeful of them dying.
Fine then I hope he lives a long life and I hope he does not change. I want him to be this way for a long life since I want to live in a heaven.
Good I am glad that you realize that it is bad to be happy that your relative is dying. Just continue staying away from him and you won't have to deal with him.