Bruce had always been considered - and considered himself - a loner. His parents long gone, he couldn't know what it was like to have your family turn on you the way Diana's had. But for someone so relatively accepted as isolated, Bruce had surrounded himself with a different type of family, one he'd not quite chosen himself, but all of whom had found their way into his life and never left.
Diana was one of those people, as close to family as he had, and it wasn't an emotion he could easily convey, but if she didn't have the strength and support of her sisters, she did have that of her brothers.
Chuckling, he tried to imagine a Diana truly humbled. "I'm often reminded that a little humility is a good thing," he smirked. "Nor am I concerned with your pride. I'm..." Bruce paused, collecting his feelings, trying to put them into words. "I'm only telling you the truth. I'm angry they hurt you, and if they can't see you for what you are, there are others who can."
She was family; and Bruce always protected that which was most valuable to him; by word or deed.