Look, there are people all around us. Neighborhood streets have, what, 50 people on them? People congregate at churches, bars, coffee shops, even Wal-Marts.
Loneliness is a self-inflicted problem. I'm not saying that to belittle it, I'm saying it because the reasons most people give for being lonely have nothing to do with the actual reasons.
Real, authentic human connections banish loneliness with a ruthless effectiveness. And you can make one with anyone. But we never want to make an authentic human connection with just anyone. We place conditions on the people we're willing to get close to. And paint ourselves into a very lonely corner by doing it.
I used to get lonely a lot in my mid-twenties. I had a bar I went to, a coffee shop I frequented, and good friends at both of them. But I was still lonely. It took a lot of self-inquiry, but eventually I realized that I didn't have a loneliness problem, I had a status problem that was presenting as loneliness. I wasn't seeing my life as having turned out the way I wanted it to, so I was beating myself up over it.
Psychological problems respond really well to talk therapy. Unfortunately that's not a very good solution. We don't have the resources to give everybody with the problem therapy. Instead I think we need to adopt a similar approach that's being used for suicide prevention. Train "gatekeepers" to identify at-risk individuals and get them the help they need, and increase awareness in the general public.
I wish we could do more. But without massive a public investment in psychological health, personalized treatment will remain a luxury solution for those who can afford it.
There's also the problem that, even if the infrastructure were there, that doesn't mean people will take advantage of it. Loneliness is tied very closely to the pride part of the brain, nobody wants to admit they have a problem and seek out help for it.