Well in the game 358/2 Days it seems that Xion
dies because she haves ti return back to Sora to
complete the process of Sora's awake. When she dies
it seems that Roxas started to CRY.That's an
totally proof that through they may not have a hart-, hart they are conected and well is true love between them :D Love Roxas and Xion so much.
The hart-, hart factor dosen't exist in their case.
They may not have a hart-, hart but they have an soul!
I really want that Xion could appear in one game
of Kingdom Hearts for real and Roxas too they
must meet again because Roxas is ment to be with
her!!! Yea Yea Namine helped with something but she
with Roxas? NO WAY!!! She may be with Riku :P Anyway I really hope that Xion will have an come back :/ Her story with Roxas was ment to be continued ^-^