How do I leave my husband?

Well you are not liable for anything if you do not sign the lease. Also if you do continue to live there the landlord can insist that you pay something. I suggest finding friends or your family that can be there with you while he is home to move. The more people that are around the less likely he is to do anything and if he gets abusive then you have every right to call the police and have him escorted out of the house.