Congratulations on your last gig with a standing ovation. Please to hear your friends' heart surgery good news. I hope that CMM lung scan comes back with good news.

Have you discussed with him about it? Could he be afraid that he sees it as an enormous task and he doesn't I is where to begin? If it's the case could the two of you sit down for 30 minutes to start with once a week then when CMM sees some results maybe you could be increase the time spent on it.

You are being supportive by telling him that he needs to do something about it, but as you pointed out you can't do it for him. Let's see this from a different angle if you weren't in his life he would have had to do it for himself, so yes you can support him and give him the courage to start this but you don't know all the infos only him. I'm sorry if I sound harsh and selfish in my thinking.