Am I The Only One Who Feels This?

I was in a relationship with an extremely narcissistic person and it has deeply damaged my mental state with new relationships. After being ghosted and lack of empathy, I still went back to the person. He broke my heart countless times, yet I still went back for four years. Everything was fine at first but I know realize how brainwashed he made me and I feel like every new person will be like him. It has extremely mentally broken me and I end up pushing people away. It has been six months and I still can't push the thoughts out of my head. What should I do at this point?