I use to think Belle was just as she said. Brought on by Rumple. But now I think differently.
I think the Neverland Belle is Pan trying to slyly discourage Rumple from saving Henry by putting doubts into his mind. Especially when she said " Nasty habits cant be broken, can they? Also I see Rumple is struggling with Neverland Belle's words. Which I know the real Belle would encourage and support Rumple. This one is making him doubt himself.