So that's what happened to Hillary!
LOL!
Other than the human blood thing, aren’t those the kinds of things people in love do all the time for the people they love? Isn’t a love story essentially about what people are willing to sacrifice for the person they are drawn to?
If a few days of pain would give me a lifetime of bliss in the arms of the person I loved, why is is “self-destructive”?
As to the “take away her humanity”, the point of the story, which is of course fiction, is that these vampires have NOT lost their humanity, and in fact the major subplot in the first book is Edward getting back some of his humanity.
Of course, I’m used to this fiction being a Buffy/Angel fan.