Human beings are an intrinsically gregarious species - our personal relationships are of immense interest to us and are a key factor in achieving happiness and well being. From the moment of birth, humans crave love and intimacy and we devote much energy to creating and maintaining successful personal relationships throughout our personal and our working lives. However, modern industrialized societies present a particularly challenging environment for sustaining rewarding personal relationships. Understanding how people initiate, develop, maintain, and terminate relationships is one of the...