As @Summerabbacat noted, Nick needs intensive therapy and a mother who "sees" her son and the time he needs from her...
What a remarkable transition from the very beginnings of this story...it is almost as if Nick has become Jack, and Jack, Nick...
“What if we start to annoy the crap out of each other?” I asked. “Or get bored?”
Jack chuckled. “Then we annoy each other. But we work through it. That’s what couples do, or so I’m told. Besides, we already live together every day here. I think we’ll survive.”
“But we’re, like… just teenagers,” I pointed out.
“Teenagers who’ve been through hell and back,” he countered. “That earns us at least partial adulthood. And hey – if we fight, there’s always make-up sex.”
My face went nuclear. “You are becoming a sex fiend.”
He grinned, totally unashamed. “You always bring out the best in me, Nicky.”