first of all here's a hug You need one.
That is a very emotional and distressing situation you are in and one on which I would not like to advise.
Is there anyone who is a christian whom you can trust and talk and pray the matter over with?
i can tell you a little bit of my story so you know I know the feelings you are having right now. My husband physically and mentally and emotianaly abused me for years. He is not a christian, infact he is an alcoholic. We separated after about 19 years of marriage but because as I christian I didn't want to give up on him and didn't believe Divorce to be the answer we remained friends and I have still had to put up with mostly emotonial and verbal abuse over the past 5 years. After continuously praying for him and my friends in church praying for him I have decided to move on with my life but I will still continue to pray for his salvation but I can't trust him ever again enough to live with him and I think the years just wore me down and wore out my love for him as a wife should love her husband.
I lived with this man and put up with things I should not have had to put up and things I don't believe GOd wants his children to live with for many years because of my failure to put the situation totally in God's Hands and to trust Him in it, because of my children, because I had no where else to go, because of a whole lot of irrational fears, because of listeneing to christians tell me that as a christian you cant get divorced its not right, because of a whole lot of reasons.
One thing I will tell you please trust the situation to God and He alone will guide your steps, He holds your future in His hands and He knows the plans He has for you (Jer 29) Seek those plans and let God deal with the situaiton in your marriage.
god bless