This paper examines the psychological and emotional dynamics underlying the relationship between Shekhar and Lalita in Sarat Chandra Chattopadhyay’s Parineeta using attachment theory, psychodynamic interpretation, and cultural affect. Drawing on Bowlby’s (1982) and Hazan and Shaver’s (1987) models, the study interprets Shekhar’s protective yet insecure love and Lalita’s empathic devotion as contrasting attachment orientations that evolve toward mutual security. The analysis, which uses a qualitative, hermeneutic approach of theory-led close textual reading and explication, shows how colonial Bengal's moral ethos uses jealousy, silence, loyalty, and forgiveness as culturally infused emotional regulation mechanisms. The findings stated that Parineeta turns romantic love into a process of psychological maturation: Shekhar moves from anxious-avoidant dependency to earned security, while Lalita’s care ethics redefines feminine virtue as emotional intelligence. Integrating cross-cultural psychology and postcolonial affect theory, the paper demonstrates that Chattopadhyay intuitively anticipated modern concepts of relational growth and resilience. The study advances the global applicability of attachment theory and aids in the indigenization of literary psychology by redefining love as ethical attachment, where moral awareness and emotional security coexist.