[Even if he'd known the story that Xehanort had been told, Sora's bad at lying. He can say people are his siblings but only if he really feels that in his heart. Even so mistrust is born when truth is revealed, no matter how good the intentions are. It could be the final push needed. Sora, while not going to spill everything, wants Terranort to always be able to trust him because he wants to save him from the Darkness.]

You've got people who care about you and want to help you. They always try to do what they think is best. So try and remember that when you're thinking about that.