My husband was addicted to porn. In his case it was all part of his abuse of me. It was just one more slap in the face. I reached a point that I told him that if he didn't change his behavior he would force me to divorce him. Took a long time and a lot of therapy for me to reach the point I had the courage to stand up to him. I'm not saying what your husband is doing is abusive. I only relate my story to show I have some understanding of what you are facing.

You say that divorce is not an option. What if your husband's addiction was to something other than porn? It does not sound like he has any intent to try and overcome his addiction. Frankly, it sounds like he is using his "addiction" as an excuse for his behavior. Personally, I'd toss him out on his butt, but it sounds like you do not want to do that. Have you talked to your pastor just yourself about how this is affecting you? If so, what did he say?