"La Belle Dame sans Merci"

I found it interesting, and a little confusing, that "La Belle Dame sans Merci" means "The Beautiful Lady without Pity" since in stanzas 5, 7 and 9 she appeared to be sweet, caring, and nurturing to the knight; almost as if she was taking care of him by providing him with food, a sense of divine purity, love and company.

Then once she puts the knight to sleep, he has this very distressing dream of death befalling kings, princes and warriors - which is why, in the last stanza, he conveys this being his reason for staying where he is. Personally, stanzas 9-12 make it seem that the knight was able to dream because of the faery-like lady - a warning in the form of his dream - so if the lady is to be without pity, why does it appear as if she is warning the knight of the death that could come? Or was she simply showing the knight the sureness of his future, and that there was no escaping it, no matter how long he stayed on that cold hill side?

To further my interest and confusion of her being known as  "The Beautiful Lady without Pity;" why is it that she was crying, and sincerely portraying the emotion of sorrow in stanza 8 if she truly has no pity? In my opinion, those with no pity would not shed a tear in such situations, or even have a remorseful thought on the matter.