My grandfather used to say, “No man is an island, but some try to be.” He was talking about those men who, despite their deep sense of loneliness, are too strong – or perhaps too proud – to admit it.

However, people who said they were always alone were more likely to say they felt lonely. We also found that people who live alone are only slightly more likely to feel lonely more often.

About 30% of Millennials report feeling always or almost always lonely, while Generation X comes in at 20% and Baby Boomers ...