Don't worry, it's not just one of his teachers he thinks this about. It would be quicker to name the exceptions.

"Don't call me that." He might not speak French, but the meaning of that is common knowledge. No, he does not appreciate being called 'little one'. And he's thirteen and thus totally knows what he does or doesn't want. "And don't talk to me about how long or short life is."

That last is delivered with a sharper, more bitter edge than anything else he's said thus far. He'd missed five years; he doesn't need to hear this crap.