Hi, U are in a very difficult sitch. I was there in July. OW was a church member. We are separated. My H lost his position since preachers can't have GF, fundamentally wrong--you know!
Web site you can give him or book to give H if he decides he has a problem... is "Every Man's Battle".
The pain you are feeling is so intense. I'm so very sorry you have to experience this.
Honestly, the changes you will begin to make when you start doing the baby steps of DB/DR are worth it. You can do this.
Consider reading Micheles info on good C/bad C for marriage up in Newcomers. It is excellent. You could do the phone counselling as well.
Again, my heart goes out to you. You do not have to keep secrets for your H. Ever. That lets H control you. Just tossed that out for you to chew on.
The love of your life is still the love of your life. Even if you leave.