My couples therapist told me my ex is a narc and said "There is no salvation and if you don't want a life of deep insanity, then run"
I didn't listen of course cause I knew he would change and we would be ok. Well a year into it, he cheated and then all the real juicy crazy came out of him. I left, never looked back
I can spot a narc from a mile now.
There is no cure because it's not a disease, it's a personality. It would be like trying to turn someone gay/straight, a dog into a cat, a flower into a tree......it just is