It isn't necessarily so that you will end up being D. If you only knew how many times my h had told me the same things that your h has said. He did call a L but never did anything with it.
My h used to tell me that he was getting a D. he told the neighbors and his and my family. He said that he couldn't live with me anymore, felt nothing for me. That is all a part of MLC. Granted there are no guarantees on anything in life, but the sound of your h right now sounds the same as most of us here.
So what I am saying is just because he is saying these things doesn't mean anything right now. Keep hanging in there and let him be as much as you can.