As the saying goes, Sal, "you can pick your friends but you can't pick your family." While true the corollary is also true: "You can ignore either if they turn out to be asswipes."
You owe him nothing. He sounds like a first-class cunt and you are right, he's never going to change. So fuck him. His behavior has no impact on him but it sounds as if it is killing you. Write him off.
You owe him nothing. He sounds like a first-class cunt and you are right, he's never going to change. So fuck him. His behavior has no impact on him but it sounds as if it is killing you. Write him off.