Am I truly making the right move?

Hubby and I have been together for 11 years. We have had many problems, like most marriages do. But we always managed to get past them. He had been unfaithful. One of our major issues was finances. He doesn't seem to keep a job for long periods of time. He quits before he has a new one and then the burden of our finances rests on me. I lost my job April 2009 and he quit his in May. We have been existing on my unemployment benefits. Those are now gone. My daughter moved away a few weeks ago with my grandchildren and that has been overwhelmingly difficult for me to deal with on top of our financial situation. I have been unable to find a job and to be quite honest he barely looks. I have lost myself and my inner strength over the years. I have made the decision to move out of state to start over and focus on getting healthy and taking care of myself for a change. He is not coming with me. He claims that once I am settled, he will come for a few weeks and check things out. He will talk to some employer's and see what comes out of it. I told him that is his "out". That since he is not promising to move, only to visit, he will use that as his excuse. He says no and that he gives his word. We have NEVER been alone as a married couple. Always had my daughter or his handicapped mother or both. Despite all that has happened I just don't feel like our marriage is over and he says the same. But I still have this nagging doubt and would like some kind of reassurances.