I'm sorry that you're feeling what you are...I know it's painful. It's hard to find words to comfort someone when they're experiencing this kind of pain. I can offer this...it's been offered to me...
"Retain absolute faith that you can and will prevail in the end, regardless of the difficulties, AND confront the most brutal facts of your current reality, whatever they may be." - The Stockdale Principle
You have to be realistic about your current situation and yet, stay optimistic about the future. Stockdale says he never lost faith in the end of the story…he never doubted not only that he would get out (he was a prisoner of war), but also that he would prevail in the end and turn the experience into the defining event of his life.
I feel for ya'. Many of us here have felt the pain that you feel. It hurts like a b!tch. There's nothing to do, except take the pain...and keep going.
"Always go straight forward, and if you meet the devil, cut him in two and go between the pieces." - William Sturgis, clipper ship captain, 1830's.