You only share with the people you live with?!
Are you assuming you will all live together forever? If not, will you want to connect more with others one day? What do you think people who live alone should do, just not share with anyone? And is it really enough for you to have so few proper, deep connections? Don't you want community? (Unless there will be a drip feed that you live in a commune!)
You say friends are not interested and you have too many to share at that level. But it's the few who one really "clicks" with where you would want to share at that level, not every single friend/friendly acquaintance.
I don't think this is why people are lonely. They are lonely because they don't reach out to the people around them in their local communities, shops, voluntary work, join local groups etc. It is what are called 'loose social connections' that are more predictive of loneliness and the bad health effects of that; close friends come after that.
I don't know how it's actually measured in terms of predicting loneliness. But there's a difference between "loose social connections" and real, deep loneliness that comes from not having people to really share with. It's a quietly devastating loneliness to be surrounded by friendly acquaintances and looser friendships but not have the particularly special close people.
Oddly enough, an awful lot of people who don't reach out, make those social connections, make an effort... do not feel lonely. They don't bother with social connections precisely because they have their partner or family and don't think beyond that. Of course, that may lead to loneliness later in life...
As for not regularly talking to someone the other end of the country, in the past - I did acknowledge that. My point was about day-to-day sharing, whether in person or enabled across distances by phones. So many people nowadays seem to not want to connect or share like this at all (apart from with partner/children).