How does maintaining friendships outside of a romantic relationship contribute to its longevity?

In many romantic relationships, partners might wonder how external friendships play a role in the health and long-term success of their partnership. While some may view outside friendships as potential distractions or stressors, others believe they can offer emotional support, diverse perspectives, and unique experiences that enrich a romantic bond. By maintaining close friendships, individuals can build a support network that alleviates the pressure on the romantic partner to fulfill all social and emotional roles. This balance might reduce the relationship's susceptibility to co-dependency or burnout. It could be fascinating to explore the dynamics between external friendships and romantic relationships, and whether these relationships complement each other in fostering a more enduring and satisfying romantic connection.