Book excerpt: At one time or another we have all been betrayed by someone we trusted, all felt the sting of deceit and subsequent shattering of self-confidence. And when the people we count on betray our trust, the wound is deep and long-lasting. In How Could You Do This to Me?, Dr. Jane Greer teaches readers:the types of people who are more at risk of betrayal the warning signs of someone who is untrustworthy a process that helps decide whether a relationship is worth saving or whether it should be abandoned.Part One discusses the roots of trust, blind trust, and the reasons betrayers betray. Part Two reveals our betrayers' many faces: admirers, users, or rivals. Part Three focuses on the fallout from betrayal: confrontation, revenge, and betrayal, and talks about how you can learn to trust your judgment and others again.