Love theory refers to the basic theoretical concepts about love, which usually include the following aspects: 1. The definition of love: Love is a strong emotional experience that usually includes intimacy, emotional dependence, passion, and desire. It can bring happiness and satisfaction. The three elements of love: Love is usually composed of three basic elements: intimacy, passion and commitment. Intimacy refers to the emotional connection and mutual dependence of each other. Passion refers to the intensity and romance of love. Promise refers to the willingness of each other to share responsibilities and maintain a relationship. The basic characteristics of love: The basic characteristics of love are intimacy, emotional dependence, passion and desire. At the same time, it also needs the support of commitment and responsibility. 4. The development of love: Love is usually composed of three stages: romantic stage, stable stage and degenerate stage. The romantic stage is the starting point of love and usually includes mutual attraction, romantic dating, and getting to know each other. The stable stage is the development stage of love. Both parties begin to understand each other more deeply and establish a relationship of mutual trust and dependence. The degenerate stage refers to the period after the stable stage when the love relationship starts to cool down, and the emotional connection between the two parties gradually weakens, eventually leading to a breakup. Love is a mutually dependent relationship that requires the efforts and cooperation of both parties. Both parties needed to support and understand each other, solve problems together, and maintain their relationship. These are some common aspects of love theory. Of course, the specific love theory needs to be analyzed and discussed according to different literary works and plots.