Abstract - This study looks into how young adults’ defensive mechanisms affect their ability to build close relationships. The study concentrated on investigating the connection between attachment related anxiety and avoidance with mature, immature, and neurotic defense mechanisms. 180 young adults aged between 18 to 25 had their data collected using a quantitative study approach. The experiences in close relationships revised (ECR-R) and the defense style questionnaire (DSQ-40) were used to examine attachment related anxiety/avoidance and defense mechanisms, respectively. The results show a substantial negative link between attachment scores in people with mature defense mechanisms, indicating that people with better interpersonal interactions are also likely to have higher levels of mature defense mechanisms. Nevertheless, no meaningful associations were discovered between immature defense mechanisms and their attachment scores. The results showed a somewhat positive association between neurotic defense mechanisms and attachment scores, suggesting that those with higher attachment related anxiety and avoidance also typically have higher levels of neurotic defense mechanisms. Overall, the findings are consistent with the hypothesis that while neurotic defense systems also influence attachment patterns, mature defense mechanisms are linked to lower anxiety and avoidance in terms of attachment. These results advance our knowledge of how attachment styles and defense mechanisms interact in the setting of close relationships among young adults.