What do you do if your ex-friend hates you?

Try to resolve the issue that caused the upset, if it can´t be fixed then sadly you move on. But a TRUE friend might be angry for a while, but they ALWAYS forgive in the end. You can go through life and have many mates but True Friends, are rare. Count your self lucky if you can count on more than 1 hand, how many you really have when you are older.