Why do new friendships become less frequent with age?

As people age, many notice that their circle of friends no longer expands as it did during their school and youth years. This phenomenon is more closely linked to changes in lifestyle than to age alone.
According to a report published by Al Jazeera.net, the increasing demands of work and family, along with limited time, reduce opportunities for the spontaneous and repeated encounters that typically help friendships form. Past experiences may also make individuals more cautious and selective when building new relationships.
Social research supports aspects of this picture. A study by researcher Jeffrey Hall at the University of Kansas indicates that moving from mere acquaintance to casual friendship may require about 50 hours of interaction, while close friendship may demand more than 200 hours.
On the other hand, forming new friendships remains possible through initiative, continued participation in shared activities, listening to others, and gradually building trust.
The Harvard Study of Adult Development highlights the importance of good relationships for well-being and mental and social health, underscoring the significance of maintaining human connections at all stages of life.