Hi @BronH, welcome to the forum.
I have bipolar and also become very depressed without company. One of the things I have been doing over the past few years is participate in activities run by a local mental health organisation in the community. I've been part of groups focussed on craft, cooking, hydrotherapy, a kind of easy outdoor games group, xmas celebrations, womens groups, and now mainly I attend art group. I find this place and its activities so beneficial to my wellbeing. Even though I've not made close friends there, it is so nice to spend time with other people who know what it is to struggle with mental health. Far less judgemental, much more understanding.
I wonder if there might be something similar in your area. If you are interested in this, I would suggest doing Google searches to see if there's anything around.
Hoping you find some more companionship soon.
In the meantime, this forum provides social connection to many of us who are isolated in various ways. You are most welcome to continue to post and get to know people here.
Wishing you well. Maz