Abstract

This study reviews the effect of self-esteem on susceptibility to infidelity within intimate relationships with particular attention to the role of sociometer theory. Sociometer theory conceptualizes self-esteem as a psychological gauge that reflects perceived social acceptance or rejection, making it a crucial factor in understanding psychological outcomes. Various psychological scales exist that can assess self-esteem and related social perceptions, helping in the comprehension of fluctuations in self-worth that influence resilience. Evidence from prior research suggests that individuals with low self-esteem often experience insecurity, rejection sensitivity, and defensive behaviours such as jealousy and withdrawal, which undermine trust and satisfaction in partnerships. Fragile or ambivalent self-esteem, despite appearing outwardly high, increases dependence on external validation and creates further psychological vulnerability. These patterns suggest that low or unstable self-esteem not only weakens relationship stability but also heightens susceptibility to infidelity, as individuals either anticipate being betrayed or seek affirmation outside the partnership. By synthesizing existing literature on self-esteem, sociometer theory, and infidelity, this study highlights the psychological mechanisms that connect self-worth with fidelity, underscoring the value of fostering secure self-esteem to strengthen interpersonal bonds and reduce infidelity risk.