Researchers Find That Only 53% of Friendships Are Mutual

Growing older often brings a quiet kind of grief: realizing that some friendships survived only because you kept investing in them. Many people eventually conduct an unspoken experiment by stopping the calls and messages to see who reaches out first.

At first, the silence may feel like a welcome break from social obligations, but as days turn into weeks, it can become emotionally heavy. This experience is often more pronounced with age, when the built-in social structures of school, early careers, and parenting gradually disappear.

When friendships are not reciprocal

Researchers note that most studies focus on how friendships promote health and well-being in later life while paying far less attention to disappointment, imbalance, and emotional labor. Sociologists Aaron M. Ogletree and Rebecca G. Adams argue that one-sided friendships are frequently overlooked in research involving older adults.

A widely cited analysis published in the journal PLOS ONE suggests that only about half of the relationships people consider friendships are truly mutual. In that study, only 53% of reported friendships were reciprocal, meaning that both individuals genuinely regarded each other as friends.

This imbalance often becomes painfully obvious when one person stops arranging every meeting or sending every message. Discovering that a friendship depended almost entirely on your own effort can feel less like a disagreement and more like a slow, silent breakup.

Loneliness as a health risk

Social isolation is becoming an increasingly important issue in aging societies. A report from the U.S. National Academies of Sciences, Engineering, and Medicine estimates that approximately 24% of adults aged 65 and older are socially isolated, while around 43% of people over the age of 60 experience persistent loneliness.

Psychiatrists emphasize that loneliness is not simply an emotional burden but also a significant health risk. Robert Waldinger, director of the long-running Harvard Study of Adult Development, summarized the issue bluntly: "Loneliness kills. It's as powerful as smoking or alcoholism."

Chronic loneliness has been associated with an increased risk of depression, cognitive decline, cardiovascular disease, and premature death. Experts stress that maintaining even a small number of dependable, mutually supportive friendships can substantially reduce these risks later in life.

Choosing connections in later life

Unlike during youth, when classmates, colleagues, or parenting responsibilities naturally create opportunities for social interaction, friendships later in life usually require intentional effort from both people. According to experts, this often reveals which relationships are built on genuine mutual care and which have survived only because one person continually carried the emotional responsibility.

Psychologists advise that recognizing a one-sided friendship does not necessarily mean ending the relationship immediately. Instead, they recommend communicating openly, making small adjustments in effort, and investing more time and emotional energy in relationships where care and attention are clearly reciprocated.

Surveys of older adults also suggest that people's definition of success changes with age, shifting away from financial achievements or social status toward the quality of their relationships. In one interview project involving people in their 80s, several participants said that their greatest sense of accomplishment came from lasting partnerships and close family relationships.

One participant described his greatest success as simply still being with his wife and feeling that their affection had remained strong over the decades. Stories like these illustrate that, despite the disappointment of discovering one-sided friendships, the relationships that remain mutually supportive often become the most meaningful measure of a life well lived.