Partner is gaining to much weight

so i don’t want everyone to say that I am mean for saying this but my partner is gaining so much weight that it kinda makes me cringe because he doesn’t try to take the time to care for himself. He gained 50pds in almost two years. He’s 6’3 at 345. I meet him when he was in the 200s but it fitted him well. He didn’t look over weight he’s pretty much a thick guy. But since the weight gain he doesn’t look thick no more just “big”.

I’ve tried going to the gym & inviting him so I can motivate him to go with me. He said no. It was my first time in the gym and I actually enjoyed it so I kept going. I eat pretty healthy due to seeing my dad and sister go through a lot of heart problems because of their eating habits I changed mine. I always have to make things on the side for him that’s not so healthy because he won’t eat it or complain about the healthy food choice. It’s not bland food either it tastes good with flavor but he doesn’t even take the time to even try it. He usually goes I don’t want that rabbit food or that crap.

The thing is he will complain about his weight and tell me he needs to lose weight and he’ll tell me what he needs to do. Then tells me he’s insecure but does nothing for it. I tried over & over to introduce a healthy lifestyle to him. I tell him now that I honestly don’t want to hear your complaining if you’re not gonna change your habits. He inhales food. He will comeback for 3rds maybe 4ths. I never cook that much anymore so he won’t. I asked him if he was depressed or is he depressed eating he said no. Guys I’m 8 months pregnant and he bought me an entire bag of ginger snaps which I love and was craving I ate ONLY 6 out the bag. The next day he ate the entire bag, that night I didn’t even know it. I was so mad. I have to hide snacks or he will eat the entire box or bag of it.

I obviously love the man and I’m 8 months pregnant by him. But it saddens me that he won’t take care of himself like he use to. It literally makes me cringe like I said before now I’m hiding my snacks from him. His dad had health problems due to one not eating correctly and taking care himself as well. I try telling him that he has a kid on the way now try caring for yourself more. It’s like the person I met is fading away.

Meanwhile me at 8 months still tries to very much keep up with myself to look and feel appealing. Also I believe when you take care of yourself and continue its great for your mental health as well.

I don’t even know what to do at this point