This study aimed to evaluate the effectiveness of a positive psychotherapy in enhancing in improving interpersonal relationships, self-esteem, and in reducing rejection sensitivity among university students with insecure and secure attachment styles. Following approval from the Institutional Review Board, Participants were recruited from University, and olny those who provided informed consent completed a screening assessment for attachment type. Among 30 selected students, 20 who voluntarily agreed to participate in group programs were randomly assigned to either the experimental or comparison group(10 in each), while the remaining students were placed in the control group. The data were analyzed using IBM SPSS Statistics 22, employing a 3 x 2 two-way mixed ANOVA design. The results were as follows: First, the positive psychotherapy significantly improved interpersonal competence and self-esteem and reduced rejection sensitivity among students with insecure attachment. Second, the program also had a positive effect on reducing rejection sensitivity among students with secure attachment. Finally, the clinical implications, therapeutic significance, and limitations of the study are discussed
