The male who pushes back on the American ethos of gregariousness used to be a romantic figure.
In fiction it was the kind of character played by James Dean.
In real life it was out of the box author J.D. Salinger. Actually, in the recent biographical film about him there's speculation that he engineered that image to enhance his mystique.
Today, psychologists like Niobe Way do deep dives on the dangers of male isolation. Today there is a major article in The Washington Post on how the disconnected male can morph into the next Elliot Rodgers. Here you can read that.
Now, it's likely parents, teachers and therapists will be on the lookout for boys who seem to spend a lot of time alone. He will be stared out, talked to, tested, monitored forever. Not that this is new. Microsoft founder Bill Gates used to be hounded by his mother who wondered what he was doing down the basement, alone. He would shout back up up the stairs, "Thinking."
It's unfortunate that young males won't be left alone to be alone. Suspect will be their preoccupation with digital everything. After all, they could be out there with the Boy Scouts camping in the woods and singing songs together around the fire.
My closest friends are males who are loners. That's not a contradiction in terms. They sure can connect. But they made it part of their value system to do that only now and then.