Sometimes you can't change a man

I know what I got into. I knew he smoked but after 13 years I'm done. Seriously my son is 16 can't hide that from him. I'm tried of him saying he will change, he will quit but he goes back on it again and again. I'm just tried of it already. Time to grow up 34 years and still smoking. I just think is too much already....just venting.