Core Viewpoint - The article discusses the increasing difficulty adults face in forming meaningful friendships, despite having numerous social media connections, leading to a new form of loneliness crisis [1][2][3]. Group 1: The Nature of Adult Friendships - The belief that having more friends equates to higher social value is a misconception in contemporary society [3][5]. - Neuroscience suggests that the human brain has a natural limit on social relationships, and excessive low-quality online interactions can dilute meaningful connections, negatively impacting mental health [5][6]. - The concept of "Dunbar's Number" indicates that humans can maintain stable social relationships with about 150 people, with true close friends typically numbering no more than five [8]. Group 2: Importance of Quality Friendships - Stable friendships provide emotional support and significantly contribute to mental and physical health, reducing risks of anxiety, depression, and cardiovascular diseases [9][10]. - Healthy friendships can lower cortisol levels, alleviating stress and anxiety, and can even influence longevity, as evidenced by studies showing lower mortality rates among those with stable social circles [12][13]. Group 3: Changing Dynamics of Adult Friendships - Adult friendships are less about geographical proximity and more about psychological closeness and understanding [15][19]. - The demands of adult life make spontaneous social interactions challenging, leading to a shift in how friendships are maintained [16][17]. - Adults prioritize friendships that provide support without overstepping personal boundaries, valuing quality over quantity [19][20]. Group 4: The Evolution of Friendships - Friendships in adulthood may not require lifelong commitments, and it is essential to periodically assess the quality and mutual support of these relationships [22][24]. - Healthy friendships are characterized by acceptance, loyalty, and appropriate boundaries, allowing for personal growth and self-care [24][26]. - Recognizing that friendships can change or end is a part of personal development, and learning to let go of relationships that no longer serve a purpose is crucial [28].