The foundation of healthy, reciprocal relationships is trust. When it’s broken, it can be hard to build it back. Small ruptures and disappointments between friends are normal, so being able to forgive, repair and change for the better is necessary for any relationship. But when there has been a gross betrayal of trust - like a friend steals money from you, cheats with your partner, or divulges very personal or sensitive information to others - it’s time to cut ties.