This study leverages Social Identity Theory (SIT) to explore themes of identity, belonging, and relationships in Sylvia Plath's "Mad Girl's Love Song" and Elizabeth Bishop's "One Art." Using a comparative qualitative approach, the research examines how personal and social identities influence the speakers' experiences of love and loss. Plath's poem illustrates a crisis of social identity marked by the speaker's detachment and internal conflict, reflecting struggles with isolation and idealization. In contrast, Bishop portrays loss as a communal experience, highlighting an evolving identity characterized by resilience and acceptance. The findings reveal that while both poets illustrate identity transformations shaped by relationships and loss, they utilize different coping mechanisms—Plath through fantasy and Bishop through pragmatic acceptance. This analysis underscores the intricate relationship between social identity and emotional responses, enhancing our understanding of how societal contexts impact individual identity formation.