Live in relationship, also called cohabitation or common law is an intimate partnership where couples live together without being legally married. L This type of relationship is common in many parts of the world, especially in Western societies. Correlational design was used in this study. The Research was done on 50 People between the age range 18-25. The Systematically sampling was used for the selection of FIAT -Q in which variables are. FOMO, Assertion of needs, Bidirectional Communication, Conflict, Disclosure and Interpersonal Closeness, Emotional Experience and Expression among live in Relationship (The FIAT -Q 2014)Interpersonal relationships questionnaire and fear of missing out (FoMo) were administrated to meet the objective. The result reveals that mean of male is higher than female where as females has more emotional experience and expression and Fomo than males . coefficient of correlation result revealed that A Pearson product moment coefficient of correlation was positive significant between assertion of needs, bidirectional communication, conflict, Disclosure and interpersonal closeness, Emotional experience and expression, fear of missing out in Live in relationships. The findings revealed that FOMO strongly predicted Assertion of the needs, Bidirectional communication, Conflict, Disclosure and interpersonal closeness, Emotional experience and expression. Conclusion of study was Fear of missing out (FOMO), assertion of needs, bidirectional communication, conflict, disclosure and interpersonal closeness, and emotional experience and expression are important factors to consider in understanding and navigating live-in relationships. So, couples should work on it and help each other in assertion one’s needs. There should be proper communication between each other. They should work on each other to reduce conflict between each other and work on there emotional experience and expressions . And couple should also work on there fear of missing out by supporting each other.