IMOP I would say to tell him what you found but do not argue or get into a big R talk.
But before you do this you need to decide what you will and won't be able to handle.(create boundries for you). Let him know that you know do not argue, just state the facts. H needs to decide to want to end the A uninfluanced by you but within the boundries that you set.
This holds him accounatable for what he is doing, But by you not arguing you are doing the best DBing and he'll see that.
DO you understand what im'e trying to say?
JAK
You don't get to choose how you're going to die. Or when, you can only decide how you're going to live now. ~Joan Baez