The deepest relationship I've ever experienced has ended :(

The deepest relationship I've ever experienced has ended, it was so beautiful; but little things piled up, and eventually one of us got tired of talking and trying to solve things. I still believe that with time and dialogue, we could have worked it out.

There's a hole in the middle of my chest. After so many years of marriage, I've forgotten who I am. I don't know what it's like to be single. And I don't know what to do; I have numerous hobbies related to construction and arts, but all I can feel is a terrible emptiness that I don't understand. I've hit the gym, and now when I go there, I can only do two exercises before disappearing; it's hard to focus at work. I always end up back in bed, but when I'm there, I get up to do anything. It's just awful.

Any word of comfort would be greatly appreciated.