The average adult only has three true friends – and no idea how to make a new one, according to a study. Researchers found Brits typically stop making new friends at 37 – but one in four haven't formed a new friendship since the age of 24.As a result, 22 percent often feel lonely – despite having a busy social life, and lots of family around – and 72 percent would love to make new friends. Despite this, 48 percent think it’s harder to make friends or meet new people as you get older.Nearly a fifth (17 percent), of the 2,000 people polled, feel they are clueless when it comes to making new friendships, with a third admitting they'd be nervous at the prospect.However, 27 percent would be willing to take up a new activity in a bid to make new friends, while 18 percent would give meet-up ap...