TG is right. Talking to him about it in a compassionate manner is not "coddling". The guy already feels embarrassed enough and if you start bringing in outside people, etc. it's going to push him even further inward.
Maybe it's boundary time. You go in, close the door and say you really need to talk because you have questions about the safety of your health and his. If he starts to backpedal, then you stand firm. You need to come up with a consequence if he doesn't want to respect your request.
Get the door open so that he will be open to going to therapy or whatever counseling.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.