You really haven't noticed? [She raises an eyebrow in plain disbelief.]

You've been quiet, and kept to yourself... more than usual, I mean. I've hardly had a decent conversation with you since our trip to the department store.

Honestly, it's been... worrying. [Her expression softens a bit, and she gives Xion a very concerned look.] Like something really bad happened, but you don't want me to know about it for some reason.