I suggest looking up information about the greiving process. When we loose anything in out lives there is a process we go throught to disconnect from it. You really don't have to just sit and wait for it to be over - you are and can be in control or your feelings and this whole process.
The Grieving Process:
1. Denial - "He'll come back to me", "He cannot leave"
2. Anger - "I cannot beleive he'd do this to me, I hate him"
3. Bargining - "We could be together if he'd only.....", "Maby if I stop ________ he'll love me again"
4. Depression (self explanatory)
5. Acceptance "We just wern't ment to be"
This is a completly normal and absolutly nessisary process. The best thing that you can do is accept the stages and set a time limit on how long your going to allow yourself to feel that way - then allow yourself to greive in that stage and move on.
I know how difficult it is, amazingly I was married to a man for 5 years who abused me in every way possible and it was still hard to walk away. After my divorce it took me about 6 months to go throught the process, but I now could not be happier.