I am surprised that this study only mentioned pets very briefly in the end. Pets have been demonstrated to be a very good substitute for social interactions, in fact they can be less stressful than forcing interactions with other people just for the sake of being "social".
I also found something else interesting in this article, the mention of someone being expelled from the tribe and how bad it is. Well, our modern social lives are nothing like a tribe. If it was, then all sociopaths/psychopaths would have been expelled because they cheat, lie, oppress the tribe and make its life miserable. But as we see in today's society is clearly not the case.
Also surprisingly the article does not dwell much on extroversion/introversion which is very relevant, what is unbearable for an extravert, is not that bad for an introvert. Maybe the author of this article is an extrovert and is terrified of being alone, just like introverts are terrified of being locked in a room with 10 chatter boxes that never shut up.
Think about people you are with. You might get married just to avoid loneliness, but if you do not love this person can you expect to escape loneliness and lack of intimacy? You can stay in touch with people you have nothing in common, but does it not make your loneliness even worse? When there is an elderly in a family and no one gives a hoot even though the family is around how is it not being lonely? It is not a quantity of interactions but quality, I am surprised the article fails to make this distinction.