We are adults…sexting will likely lead to something overt. Meets ups? Maybe. Virtual sex? Possible too. This is going to go farther than what it is now. The high of sexting will fade and graduate to something else. Will you feel the same when he moves on to perhaps virtual sex? He still won’t be technically cheating, but it will affect and deteriorate your relationship. I don’t recommend staying in this. Not because of his issue, but because of his attitude. If someone doesn’t want to fix something that hurts you, you don’t matter enough to them. He has chosen his addiction over you. Now you know you are subordinate to his addiction… Ask yourself if this is what you really want? I’d say long run it’s too hurtful. It will chip away at you.