Hey Broken, man I have been there. My ex fiance left about a year ago and the first six months were hell, the absolute worst pain I have felt in my life. I lost about 15lb and stressed so much I made myself sick. My ex never called, never made any attempt to see how I was doing or if I was still alive.
The only thing that has slowly helped me turn things around is creating a better life for myself. Making new friends, joined a paddling team, started going to the gym four days a week, and took some classes. I didnt get magicaly better and I am still not fully healed...but I am better.
You can do this, who knows one day he might see what an amzing woman he lost and start begging...