You are not a waste of human life, but you can't make some one do what they aren't ready to do. His health is an issue and no, we're not saying he should get heavier, by no means. I'm sure he knows he has to lose weight so maybe by him seeing how much effort and success you have, he might follow. What does his doctor say, maybe if he hears it from a professional he might try. some times that scares people more than just hearing it from loved ones.
Its just like dealing with children who have weight issues. You can't yank a cup cake away from them while they are at a birthday party and expect them to understand why others can and they can't. I know he's an adult but its the same believe me. When I shop for my family I buy low fat popcorn instead of the full fat and they never know, and I never tell. Suddle changes are the best.
My sister's heavies was 425 lbs... I used to talk with her about her weight but I never said you shouldn't eat this or that, and I'd only talk about it when SHE brought the subject up. I'd pray and pray and pray that she would lose weight. She used to call me salad woman b/c every time we went out thats all I'd eat while she ate greasy burgers. Something in her head finally clicked...dunno what? but she's now about 280 lbs.... eats tons of salads now and asks for advice
I think its wonderful that you are going "behind the scenes" to help him. Working out together is fun and if you cook for him, cook healthy.
Good luck hon !!!
Psssssst.... maybe his family can nag him instead