It's unfortunately very common and a standardized behavior among men in particular. In my work as a consultant I talk to many women who share this experience. They tell stories about how their partners systematically oppress them. Every time the woman questions the man's behavior he calls her mentally ill and continues to say that she needs to be taken into a mental asylum, that she has never been loved by anyone, that none of her friends are her real friends, she has no real friends, will never have friends and never be loved and so on. The same story all over again. I heard all this too, from my mother and ex boyfriends. It's a handbook , a manual for how to belittle, to gain power over someone. Don't fall for it. You are loved and you have friends.