Stuck, there is a grieving process that you need to go through.
It takes time. You can't rush it or force it.
Are you familiar with the Kubler-Ross model of the 5 Stages of Grief?
1. Denial and Isolation
2. Anger
3. Bargaining
4. Depression
5. Acceptance
Here are a couple of articles you might find helpful:
- The 5 Stages of Loss and Grief
- The 5 Stages of Grieving the End of a Relationship
- Grief and Depression
I've heard several people say that it takes about 1 month of time away for every year you were in a dysfunctional relationship to heal. I think it is probably longer.