The Dark Triad
If you are in a relationships now and you are experiencing abuse of any kind, think twice about the relationship.
There is a phenomenon that is called the Dark Triad.
Narcissism: selfishness, involving a sense of entitlement, a lack of empathy, and a need for admiration
Psychopathy: a personality disorder characterized by persistent antisocial behavior, impaired empathy and remorse, and bold, disinhibited, and egotistical traits.
Machiavellianism: a personality trait which sees a person so focused on their own interests they will manipulate, deceive, and exploit others to achieve their goals. (wikipedia)
If you want to sort out how safe you are in a relationship with a person who has similar traits as this, consider Psychotherapy for YOURSELF.
Patients with these traits are not easily treated or cured.