Just remember one word:
"May your heart to be your guiding key"
Just believe what does your heart says about that guy, the last sentence that he said might be not heard to you, but believe in your heart, that if you are worthy of wielding the keyblade, it'll listen to your answer, maybe you can understand what did that guy said, All is he was trying is to *says the last sentence again, over and over, until she got that "kill" in her mind now* you, so don't believe in him!