i somewhat agree with nightelf.  I was also in a relationship for long time.  i understand how it feels to be loved and suddenly dumped for no reason.  I still could not find a good reason but i have moved on.  Its been couple of years since we broke up.  so i understand it would not be easy for you to forget her.  however, we all have to move on and this is part of life.  this is also a good lesson and experience of a life.  you are prolly in first or second state of grief listed below.

For me, time was the greatest healer.  Now i dont cry or remember her as i used to do.  however, deep inside she will always be in my heart.  In my opinion, right thing is to do is concentrate in something else.  i used to work out to release anger and depression.  being with near ones or friends also helps.  watch sports or movies if you enjoy watching these things.  basically, try to do something rather than staying alone. 

further, rather than saying i deserve more or cursing her, you live your life and let her live her life.