Loneliness and Our Craving for Community

Loneliness is a state of mind characterized by a dissociation between what an individual wants or expects from a relationship and what that individual experiences in that relationship.
Because loneliness is a state of mind, being physically alone is not a necessary nor a sufficient condition to experience loneliness. One can experience a lonely state of mind while being with people at work, at home or even in a marriage. Income, education, gender and ethnicity don’t necessarily protect you from loneliness, and it is contagious.
https://www.uchicagomedicine.org/forefront/health-and-wellness-articles/what-is-loneliness