I'm one of those women who took action and I made my life a hell of a lot worse. Sometimes okay is as good as it gets. I suggest you find an interest (not another man) you can enjoy as much as your husband enjoys his firefighting. I also believe in prayer :))
have you stood up and told him how you feel, a man that does not have sex anymore than that there is someyhing wrong, i would stand up abd tell him just who i was and what i would like to do, and also just ask him what ever happened to sex, you may just shock him into changing, but i would put my foot down about the porn. it is time to show him that you are somebody and want to be treated as a human being and loved and all of the good stuff luck jo
Your marriage has hit a "rut". 20 yrs of marriage is not only significant, but a lifetime, yet from reading your post, you love him, will not leave, yet will continue in a what seems like a dead end, going nowhere relationship....welcome to the world of marriage (lol). He is comfortable with his lifestyle and you are accepting it at the cost of your emotions and well being. You are putting him first, by accepting this going nowhere, porn behavior.
I personally think that porno is one of the most addictive, distructive behaviors that poisons the very core of family values and unit and it is also sending a message that their is something wrong in the relationship. so, what do you do? accept him as he is, accept the relationship as is or do something about it. Marriage counseling recommended, but I don't know if he will agree to it. Individual counseling, but what's the use of seeking help, if the other partner won't change or start taking your focus away from the problems at home and start going out with friends, family, taking care of you, but sooner or later as you said, something is going to give, where either you or he will not take it anymore and seperation or divorce will be inevitable.
Communication and trust are key to all relationships and you might need a different approach to tell him that he is not satisfying your physical and emotional needs and tell him that you are feeling lonely lately within the marriage. Marriage counseling will help to get to the bottom of the problems in the marriage, but it's time to make a change to get out of this rut and comfort zone you both are in and time put the spark back in your marriage. Good luck, Judy