[Yes. That's exactly it. They weren't always together, but ever since they left Insomnia, ever since the Wall fell, Prompto can't think of a time he was more than ten yards away from one of them, couldn't bug them to play King's Knight with him or let him play the radio in the Regalia.
no subject
He swallows and nods and answers.]
Me too.
[Out loud, he says:]
Tell me about them?