NASA Astronaut Mark Kelly spent 340 days in space and had plenty of time to think about loneliness.
Keep a journal.
Stick to a schedule.
Go outside (not easy for an astronaut in space).
Get a hobby.
People who are constantly around others are also lonely and we haven’t even begun to know the consequences of “social distancing” which is now an accepted term in our vocabulary when we probably meant “physical distancing”.
In 2018, a year ahead of the pandemic, Cigna did a survey that discovered 54% of the 20,000 people they surveyed reported feeling lonely.
A year later that number rose to 61% with 18-22 year-old members of Gen Z feeling the loneliest.
Astronaut Kelly’s article on his time in space is here.