I want to stop being friends with someone because he's black
Why do you feel that way about black people?
Their skin complexion is terrible!
That is a racist point of view. Not liking someone because of their skin color is wrong.
Fuck, wtf, I care about looks more than personality.
You can care more about looks, but you are taking it too far here. You are venturing into being discriminatory here and you should not be doing this.