Hang in there. It does get easier. Two things that helped me were:
1) Getting out of the house and doing something. Even just window shopping helps. Anything to get your mind off him and onto something you enjoy.
2) Journaling. I had so much anger and it was tempting to call him just so I could spew some of it his way. Instead I wrote pages devoted to my anger. It also helped me to work through some of it instead of just getting anger spewed back at me.
L