From the New York Post:
Forty-five percent of adults say they find it difficult to make new friends, according to new research.
A new study into the social dynamics of 2,000 Americans revealed that the average American hasn't made a new friend in five years.
In fact, it seems for many that popularity hits its peak at age 23, and for 36 percent, it peaks even before age 21.
The study, conducted by OnePoll in conjunction with Evite, uncovered that one of the reasons 42 percent of adults struggle to make friends is due to introversion or shyness.