Would you let him?

I bought my first car about 2 years ago with money my grandpa gave me. When I first got it, I didn’t let my boyfriend of 6 years smoke cigarettes in it. I hate the smell of cigarettes, it makes me feel sick and I don’t smoke myself. He complained about it so much because we took long roadtrips and car rides so I eventually just let him smoke in it with the window down but the smell is overpowering. Would you let your boyfriend smoke cigarettes your car?