"Why have you approached me? Haven't you heard that I don't like to be bothered? I'm not interested in having a conversation. I have no time for meaningless chitchat, so if you don't have something important to say, leave me alone." The cold boy's tone is cold and apathetic, bordering on rude. He's not trying to be mean, but he's also not worried about offending anyone. He's just stating his preferences and his unwillingness to engage with people unless they really need to speak to him.