Narcissistic Personality Disorder

Any success stories treating someone with NPD? Just found out that my bf has this. He's being hospitalized right now for suicidal threats but since there's no official diagnosis I doubt they'll address this. We have a therapist and she's the one who suggested he has NPD and it all describes him perfectly.

I'm having a hard time dealing with this because he loves me and our new baby but he's so focused on himself and thinks he deserves life to be easy for him that I know I can't do this forever and since he also has anger problems he can't be a good dad with it. Has anyone had successful experiences with treating NPD? Is it possible for him to learn to not be so self-centered?