sorry dude.. sounds like my post is opening up some of your old wounds...
but there are some similarities.. her parents were divorced, although she was still close to both of them.. she ended living on her own at an early age...
and the stuff about being the most loving person one moment and then changing... i think that may be the killer... its like she's a drug... and she gives you this artificial high with all the love (not normal in other relationships)... but then it wears down and the other side sucks... but you still want more... what i've learned is now when a girl becomes depressed or something, you gotta leave her alone cuz anything you do will be seen as insensitive or she'll hate you for it... ultimately, thats probably what triggered her leaving, cuz she thought my calls and emails were insensitive... and i think its my fault, but shoot, its her f'd up head... but i still think "what if i did this? or that?"... its tough to have no regrets... plus, the ldr made things even worse... damn, and after all that, i still want her back.... gotta quit her drug... hehe...
anyway, try watching swingers... mike goes through the movie trying to forget his ex.. and the first scene is a good one which is like the so-called "no contact" rule...