[QUOTE=~ My attachment was a lot about sex. But in the end my obsession isn't about that, it's about rejection, unbelief that this person in my mind isn't real. Logically I know this without a doubt. Uggggg

Just my opinion from experience but as I see it your family strife and any other negativity is like a stew in your personality and it has led up to this current condition.
I take few things from religion but one is a belief in the power of love. My advice is to send love (by just simply saying or praying those words) to everyone and every situation in your experience. Rebuild yourself. Hanging on to past attitudes-which I know you can't immediately change is synonymous with staying as your same old self.

A little diversion: Like a heroin junkie who knows it will kill him, if he should get close to it again he will be powerless to decline. That's the way it is with me too.