Please give me strength and tell me I'm doing the right thing, my husband is 3 days into a forced diet

My husband was recently fired from an outdoors job, because he couldn't handle the physical work. Very likely due to his weight. He is really overweight (probably at least 100 pounds overweight). He smokes a pack a day and refuses to go to the doctor. We barely ever have sex anymore, his belly is literally too big. The weight gain seems to be especially bad the last few months. He never wants to go out and get food himself or get his own smokes. 3 days ago, I decided that I had enough, and was going to stop enabling him. He was mad at me all day yesterday for not getting his smokes, and now he is begging me tonight to go out and get him some snacks. He made me a nice healthy supper, and I brought him home his favourite fruits. He said this morning that he would be fine with that. And yes, I realize he is probably depressed and overeating because of that. But he doesn't say why, and never wants to do anything with me that would help his depression. I've made posts in recent days. But I've hit a breaking point. This is sooo tough!!!😭 to him, I'm sure food is just like a drug.