He was so much more dangerous when he wasn't angry.

I know when I'm awake and when I'm asleep," Ronan Lynch said.
Adam Parrish, curled over himself in a pair of battered, greasy coveralls, asked, "Do you?"
"Maybe I dreamt you," he said.
"Thanks for the straight teeth, then," Adam replied.

Granddad said I needed to get some muscles because I was looking gay these days. No, he didn't really say that. Speaking of which, here's Parrish.' Someone cuffed the back of Adam's head. He blinked up. One way, then the other. His assailant had come up on Adam's deaf side. 'Oh,' Adam said. It was Tad Carruthers, whose worst fault was that Adam didn't like him and Tad couldn't tell. 'Oh,' mimicked Tad benevolently, as if Adam's standoffish-ness charmed him. Adam wanted desperately and masochistically for Tad to ask him where he had summered. Instead, Tad turned to where Ronan was still reclined with his eyes closed. He lifted a hand to cuff Ronan's head but lost his nerve an inch into the swing. Instead, he just drummed on Ronan's desk and moved on.

She drifted towards the bedroom, on her way to have a bath or take a nap or start a war.

It was true that Blue was just shy of five feet and it was also true that she hadn't eaten her greens, but she'd done the research and she didn't think the two were related.

There is no good word for the opposite of lonesome.
One might be tempted to suggest togetherness or contentment , but the fact that these two other words bear definitions unrelated to each other perfectly displays why lonesome cannot be properly mirrored. It does not mean solitude, nor alone, nor lonely, although lonesome can contain all of those words in itself.
Lonesome means a state of being apart. Of being other. Alone-some.