may be off topic but Hybristophilia is an interesting read regarding dysfunctional relationship. i only learnt this term today, never knew the whole girl-love-bad-boy thing may actually be set in reality
I can really only think that those types of cases involve some form of messed up childhood or something drastic and dramatic happened in ones life... but I can't think of any reason on this planet we call Earth as to how Sakura would grow so attached to a one point in time killer and homicidal maniac, her backstory suggests nothing... bullying is not that traumatizing unless you have no friends in life whatsoever or something to that extent, but even still the only thing linked to her childhood is her crush on Sasuke because he was popular and she herself wanted to be popular. The only thing I can remotely think is that she's doing it to spite her parents who, outside of Road to Ninja (which sadly cannot be considered true canon), we know absolutely nothing about. If RTN (God I love that movie) is to considered her parents though, then Sakura must secretly be one of the most horrifying characters introduced, because nothing suggests that type of behavior.
To think any of this could have been avoid if you just keep to the damn story you were writing... there's absolutely nothing wrong with moving on from the negative influence in your life and forming one with someone who would literally give his own life up just for you to be happy. Given my limited psychology background up to this point... when I really think long and hard about NaruHina and SasuSaku on a realistic plain... the results are quite terrifying.
Oh but Naruto takes place in a fantasy world, we try to avoid the real world by reading it... yeah well, my suspension of disbelief gets thrown out the go*damn window when you base your kitten on real life tendencies. Naruto just might be the most realistic of fantasies that actually has a negative effect on the real world despite it's once powerful message. No f***ing amount of fantasy could change my opinion of falling for a girl with no personality of her own, that's been stalking me, that takes everything I say to heart, that adopts everything I say with nothing to offer about herself, who's submissive and generally has no faith in my capabilities. No amount of fantasy could change my opinion of a guy somehow changing in a heartbeat because I kept telling him he's taking the wrong path, that he just magically isn't gonna kill an entire village/nation/leaders, that he just somehow is so pure that he's corrupt-able and that he secretly wishes to love despite stating he sees no purpose in it.
Okay I think I've made my point...