system
A chat on subreddit /r/NoStupidQuestions
human
I'm the only one in my household who doesn't smoke. They all smoke inside. The smell is really bad.

But then I got covid (they'd already gotten it a year earlier, because they never vaccinated), and was in quarantine in my room for a few days. When I first came back downstairs, the smell of the smoke was fucking horrendous, way worse than ever before. Thought my nose had gotten damaged by covid, but nope. Everything else smells perfectly fine. My nose just got used to a couple of days of constant fresh air.

So that should give an idea of how awful the stench is. Just because you as a smoker can't smell it, doesn't mean the stench isn't there.
gpt
Move out asap when you can 
&gt; Adults who do not smoke and are exposed to secondhand smoke increase their risk of developing lung cancer by 20–30%. Secondhand smoke causes more than 7,300 lung cancer deaths each year among U.S. adults who do not smoke.