My roommate almost exclusively eats fish and I can't take it anymore.

I've lived with my roommate for about 7 years and we've had minimal issues up until recently. About a 1.5 months ago, he got all his teeth pulled and got dentures. Since then, there are very few foods he can eat: fried fish, fish sticks, and haddock chowder. That is literally all he has eaten since early June. My appartment constantly smells like fish and I can't get the smell out of my clothes, jacket, and work backpack. I hate the smell. I hate it so much. I'm constantly nauseous. There are probably hundreds of soft foods he could eat, in fact, I know he likes some of them. He used to eat soups, mashes potatoes, ice cream, etc. I know it's his home too and he's entitled to eat whatever he wants but it's driving me fucking insane. It'd be one thing if it was just occasionally, or even just once a day. I can't keep doing this. I tried to talk to him about and his response was basically that I need to suck it up because he's got "at least 6 months left" of just those 3 foods. I feel I'm probably overreacting, but at the same time, I feel like he's being unreasonable and inflexible. I'd appreciate any outside perspectives.