You need some kind of lonely together COVID pod. Other people in the same circumstances. As long as your circle of contact is a closed loop, the exposure is not a big deal (same as with a family quarantined together).

You might not have a lot of shared interests or whatever, but there are countless others suffering exactly like you- in this, you are not alone. People feel a little better being lonely together. And you know, two key ingredients to friendship are simply shared hardship & routine interaction.

P.S. Ever consider volunteering with Big Brothers Big Sisters?