I feel your pain. I recently got dumped by my boyfriend. I had been knowing him for 10 years. We started dating a year ago. This person knew my ups and downs in relationships and still dated me. He claims that I am a narcissist when I am a love addict and co-dependent. Note, he seemed to like me best when I was lost. Then, when I fell in love, he became distant. You see my love was too much for him. I spent more time trying to make him happy and get his approval than loving myself. I worked too hard. My ex isn't a therapist but a nurse and he thinks he can diagnose me. I'm a nurse too but diagnosing isn't my gig. it is not generally a smart idea for a loved-one to diagnose and try to fix you. It is better to get counsel and advice from outside. You will get a biased assessment. You see people see what they want to see. What if he perceives you wrong. I would suggest a couple therapy for him to not to be your therapist and learn to support you than to fix you.

Its just a thought. He thinks he knows what is "wrong" with you and that gives him to much power to emotionally manipulate later. Seek outside advice and therapy and shut him down.