Psychological well-being is an important aspect of students’ development and educational success, particularly during early adolescence. This study aims to analyze the role of peer social support in determining the psychological well-being of students at SMP Mekar Arum Bandung. This study employed a qualitative approach using a case study method. Data were collected through semi-structured interviews, observations, and documentation involving five informants, including students and school personnel. Data were analyzed using the interactive model of Miles, Huberman, and Saldana through data collection, condensation, presentation, and conclusion drawing. The findings indicate that peer social support consists of emotional, appraisal, informational, and instrumental support. These forms of support contribute to students’ psychological well-being by strengthening self-confidence, learning motivation, emotional regulation, adaptability, positive interpersonal relationships, and a sense of security. The study also highlights the strategic role of schools in fostering a supportive, inclusive, collaborative, and bullying-free environment. Thus, strengthening positive peer relationships and school-based support programs is essential for promoting students’ psychological well-being.
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