<p>A person’s best friend and romantic partner both contribute to their psychological well-being. Generally, they know each other, and sometimes the friend serves as a confidant regarding conjugal concerns. As a result, the friend can develop an appreciation of the couple. This study examined this appreciation and its links to three aspects of the target participant’s well-being (life satisfaction, self-esteem, and depressive symptoms). It was expected that these links would vary based on the target participant’s gender and the friendship duration. The sample included 151 triads (i.e., 33 years old target participants, 64.9% women; their best friend and their partner). The best friends completed a scale measuring their approval of the couple. The target participants filled out questionnaires about their well-being. Finally, the target participants and their partner completed a questionnaire on the target participant’s experience of psychological domestic violence (control variable). For life satisfaction, regressions showed a positive association with approval for women when the friendship was of short or medium duration. Regarding self-esteem, the link existed among women and in friendships of short duration. This could be explained by closer friendship among women and the need for approval in newer friendships. For depressive symptoms, the link disappeared when experienced violence was considered.</p>