MuchMoreThanMuscle saidMaybe get some professional counseling. If you can find a good one for short term therapy this might do the trick.
As much as this may seem like overkill, it really can make a really long healing period a lot shorter.
Personally, I never really get 'over' my loves since they tend to stay around and I keep them on as friends. I consider my three great loves to be my three closest friends and confidants now. That we couldn't make it work in the relationship sense has never meant that it couldn't work out in the friendship sense, assuming the guy can handle it (some really can't and that's okay too).
Sometimes it's just best to fake it till you make it. Live your life as if nothing had happened and try to keep your mind on other things. If you stop wallowing in self pity for the person that you're no longer with you'll gradually start to forget the pain. As long as you keep trying to live your life, one day you'll go to bed and you won't have thought about them at all that day, and then it'll be a week, then a few weeks. It'll happen, you'll move on, and you'll be stronger for it.
Sorry you're feeling bad. *pats on back* it'll get better, I promise.