This study confirmed a hypothesis from the Emotion-in-Relationships conceptual model, which predicts that greater interdependence between relationship partnersor closeness creates the potential for jealousy. The study also sought to better define the positive side of romantic jealousy in addition to its more negative attributes. College students in premarital relationships ( N = 229) completed a questionnaire, including 27 different measures and the Multidimensional Jealousy Scale. Select data were obtained from 122 cases at 3-month follow-up. Each jealousy scale was tested for associations with demographic (age, sex, and race), person (life satisfaction, loneliness, romantic attachment styles, love styles, and romantic beliefs), and relationship (affective, closeness, and social exchange theory) constructs. Results clearly distinguished emotional/reactive jealousy as mostly good and cognitive/suspicious jealousy as bad. Behavioral jealousy was associated with few measures. Implications are discussed for the interdependence model of relationships and the transactional model of jealousy.