Humanity part 3

Witches and warlocks can lose their humanity as well. Now you may think they really couldn't because they always stay human however that's not necessarily true. When a magic user becomes consumed with the power of magic they may actually transform themselves. Some even go so far as to attempt immortality spells. Of course usually there are unforeseen problems with these spells but few think of this fact. So how could you tell if you're a magic user and you're losing your humanity.
1 - You no longer feel the need to sleep or eat even when you're not in the middle of a crisis.
2 - You look upon fellow humans as insignificant ant there to be used for your amusement.
3 - You are looking for a way to gain immortality or similar effects.
4 - Even your most cherished loved ones can not convince you of the folly of your ways.
Again I'm sure there are more then 4 ways to determine if you are a magic user losing your humanity but I don't wanna take up to much of your time. ;)