The document defines jealousy as the negative emotional reaction to the fear of losing a valued relationship to a real or imagined rival. It discusses how jealousy involves feelings of hurt, anger, and fear. Jealousy is distinguished from envy and rivalry. The types of jealousy are identified as cognitive, emotional, reactive/suspicious, and romantic versus sexual. Individual differences that influence susceptibility to jealousy include dependence on a partner, feelings of inadequacy, and attachment style. Finally, common responses to jealousy are listed such as negative communication, violence, and surveillance or restriction of one's partner.