I have to say that I am completely confused with my friend's behavior. This means that he was normal up until a year ago and then he completely changed. He acts like a narcissist and there is no room for friends in his life. What can activate narcissism disorder? Perhaps if the cause is eliminated, he would be his old self again.
Hmm, it had to be some really big trauma for him to completely change his behavior. As for narcissism, rejecting friends is one of the symptoms. Narcissistic people see other people as a threat and obstacle and therefore loosing friends is not a big deal at all. And of course, if the condition is diagnosed, it can be treated. Although, I am not sure if he can be persuaded to see a doctor that easily.