Crayolamom,
Do you still love your husband? If your answer is yes, maybe you should consider giving this separation some time before you make anything 'final.'
You've been through a lot, why not give yourself some time to yourself for a while, without thinking you're the bad guy?
I can relate to your situation very well, and I literally thought that I hated my H when we separated this past February. Once I had had some time by myself I realized I don't hate him at all, I just hate his disease.
Hang in there, and pray to your HP.