you break the cycle by stopping the behavior. give yourself time alone. don’t be with anyone for awhile. that is were you will grow and find your true self. after you break up with a narcissist the odds are that you will meet another one. if you learn what they are you can tell very quickly when you meet them. but you really have to learn that’s why they say to read read read. give yourself boundaries of what you will tolerate and what you wont and don’t ever cross the line . be true to yourself and you will break the cycle.