You can have many friends and still feel lonely. The World Health Organization says loneliness is not just being alone. It is the painful feeling that comes when the connections you have are less than the connections you want or need. This helps explain a common problem for young people today: many contacts, many chats, but not enough real closeness. Research on young adults also shows that friendship quality matters more than simple numbers like how often you meet or how many friends you have. (who.int)

Young people are one of the groups most affected by loneliness. WHO says about 1 in 6 people in the world feel lonely, and the highest rate is among young people, especially teenagers and young adults, at about 21%. Another large study found that loneliness is often high in young adulthood, when people are moving through big life changes such as school, work, relationships, and new friend groups. In short, life can change faster than deep friendships can grow. (who.int)

Japan shows this clearly. In the Cabinet Office’s 2024 national survey, about 40% of respondents said they felt lonely at least occasionally. People in their 20s were one of the loneliest age groups: 43.2% said they felt lonely at least occasionally. Among people who felt lonely, common reasons were the death of a family member, living alone, and changes such as moving schools or changing jobs. Japan has treated this as a national issue: its law to address loneliness and isolation took effect in April 2024, and the government revised its priority plan in May 2025. (cao.go.jp)

So, why are young people lonely even when they have friends? Because people do not need only contact. They need trust, support, and a place where they feel safe and understood. WHO says promising answers include stronger community spaces, local groups, and support that helps people build real relationships. The message is simple: being surrounded by people is not the same as feeling connected. (who.int)