L.Y.
When I was in a relationship that I didn't deserve, I struggled with the decision to end it because of my children as well. I spent 10 miserable years waiting for my husband to get himself together (actually 17 years total marriage, but 10 just because of the kids).
I picked up Dr. Phil's CD "Self Matters" and it changed my perspective and helped me make my decision to end the relationship. The kids did not deserve the drama and chaos of the unhealthy relationship and neither did I. After this decision, I read "Ending the Search for Mr. Right" because throughout the years that I dated, I always picked the guy that ended up as an unhealthy choice.
I am 40 now and single. I work full time and provide a stable home for my girls without the fighting and disrepect that went along with the unhealthy marriage. He isn't a physical part of their lives; he chose to leave the state and his responsibilities behind. It's not always easy and it would be nice to have someone else to lean on sometimes, but I know that I made the right decision for myself and my children and hopefully, I will cross paths with Mr. Right at the right time.
"Self Matters" is also available in a book and I think a workbook as well.