there has to be a third season the manga isn't done yet and when has their ever been an anime that was cancelled/stopped at a cliffhanger?
and as for hina ichigo coming back like i hope so too :)
Spoiler for ix_styles:
After a traumatic incident, Jun Sakurada refuses to interact with the outside world and return to school--he even shuts out his sister, his closest friend. Jun spends most of his time online buying spiritual items that are obvious rip-offs. One day he finds a website that curiously enough asks him to put his order in his desk drawer. Thinking it's a joke, Jun plays along. The following day a suitcase arrives containing a doll named Shiku... that comes to life before his very eyes! Welcome to the world of Rozen Maiden, where Jun must enter an all-new reality to protect and serve a living doll...
- Source: [Tokyopop.com]