withdrawn from society
reclusive - withdrawn
If you are ‘reclusive’ then you have a desire for privacy or seclusion that is characterized by living on your own and, where possible, deliberately avoiding going outside or the company of others. Such behaviour can also be imposed on somebody through a tragedy or as a result of mental illness.
Ever since Tom lost his wife he has become increasingly reclusive. He very rarely leaves his house these days.
Despite her reclusiveness that meant she refused to do any media or promotion, the author's latest novel was still a huge success.
Since retiring, I spend a lot more time at home, but I’m by no means a recluse. I still go out to meet friends two or three times a week.