No, Bella remains addicted to Edward, and he to her. Their reasons for total devotion, or a deeper meaning to the relationship is never explained. It's infatuation passed off as true love. I enjoyed the concept of the story, but was disappointed. Their relationship just didn't pass as everlasting to me, because their was no bond beyond him saving her from danger all the time and all types of lust associated with her being human. As far as messages in the book, it all depends on how serious it is taken. I think the majority of readers have enough brains to realize it's not real and real life is more complex, so I don't worry about that.