"People tend to overestimate their romantic relationships and underestimate their friendships, i think the most stark example of this is that if you look at mental health data and happiness data of people who are single, they're generally happy and healthy, as a cohort. If you look at people who don't have any friends, they're horribly unhealthy. In fact there's a statistic that gets passed around a lot, that says "Social isolation is just as adverse to your health as smoking 15 cigarettes a day". Which is shocking, you wouldn't assume that."