Is it worth salvaging a relationship when the only common bond is the kids?

I was in a ten year relationship with my ex. He recently decided to move out and end the relationship. He said he was willing to reconsider the relationship for the benefit of the kids? I dont feel it is a good enough reason to stay in a relationship. I feel that he has no intentions to change his attitude. I feel he has abused the fact that I depend on his support for the kids. He has taken advantage that I have no family in my current location. He has family present that are not involved with the kids. He also has 2 other children from a previous ex and he thinks I feel our kids are more important then his other 2 kids. He feels why should he provide more for our children than his others? Finacially I feel he can not afford to support all 4 children? But he has been working on going back to school and he stated he didn't want the relationship to distract his intentions. I feel this is so selfish and typical of him. What type of advise would you offer?