Bella: You're a dick.
Edward: We shouldn't be friends.
Bella: But you're so purty.
Edward saves Bella.
I think this is how abusive relationships begin. In the second half of the book that Edward will beat the crap out of Bella, say he did it because "He loves her SO much," and use his persuasion powers to convince everyone she 'ran into the door' or 'fell down the stairs.'