Hey Woog,
You don't have a selfish bone in your body. You are happiest when people around you are happy. I recognize the symptons.
I don't know what your STBX was like prior to the bomb but I can tell you without hesitation that the person she is today does not deserve you. You are still looking out for her in spite of all the manure she has shovelled your way. You are a good man and you will find someone who will appreciate what you do for her. hell, she may even reciprocate once in a while.
J210
PS that last paragraph sounds like you are still in love with STBX.....you know what, that would not surprise me one bit. I told you i recognize the symptons.