KaelaRose, there ARE legitimate ways to get out of a lease. One brief consultation with a local lawyer should be enough to inform you as to how.
One year is a looong time for children to be in this kind of atmosphere. Adults tend to un derestimate the amount of damage being done to the children. Since you mentioned your children---I know you are already concerned.
Please think about checking out alanon as this is too hard to do alone. It is going to get worse as time goes along---since he appears to be in deep denial.
sincerely, dandylion