Ahahaha it's okay... Jamie didn't get it for the longest time... and she's not likely to say it immediately when talking to people -- iirc she hasn't told very many people, even characters who have been in the game since the beginning. :|a This is because the reason why she's in this body is Complicated and Emotional and she doesn't like talking about it, and she's scared of telling people about it because she's worried they'll hate her for it, or something like that.

tl;dr it's complicated because being Xion is suffering and she's insecure