Is there something holding you back from leaving him? For me, as terrified as it was, I finally left my own husband. I was in a very similar situation. I won't say the process was easy but it ended up being the best thing I ever did. I kicked myself for not doing it earlier.

Does your employer have an EAP (Employee Assistance Plan). Here any company of a certain size is required to do so. My EAP really helped me out. They provided a therapist. Offered to do the same with couples' counselling. They got me in touch with lawyers. Heck, they even sent me a stress kit.