I think we grieve not only the loss of our dreams and our future hopes, but the loss of the person we initially fell in love with. That's a huge loss to deal with. I'm going through this too and I have good days and bad. However, I was so worn down from the ever-increasing blame heaped on me for just about everything and anything that I decided I needed a better life for me.
We all have to grieve our losses, but on my not-so-good days I realize that the sadness will pass. The most pivotal moment for me came when I realized I really didn't mean much to him; at least not in the way I wanted to be acknowledged and respected. Nobody needs to be ground down under somone else's heel.
We no longer feel love because I think we are so numbed from all the chaos and abuse. Love is never enough for an A anyway. There's always something wrong with YOU no matter how hard you try to be perfect, smooth things over, and make things right.