Thank you to Dr. Ami Rokach (http://www3.sympatico.ca/arokach/ ) for sharing 30 years of experience on a trending topic. See:
http://www.cbc.ca/news/health/loneliness-public-health-psychologist-1.4249637
https://www.sciencedaily.com/releases/2017/08/170805165319.htm
A "School of Life" take on the subject: https://www.youtube.com/watch?v=AtCR6P5rsXU
Interesting idea:
https://www.ncbi.nlm.nih.gov/pubmed/?term=pregnenolone+loneliness