My opinion is this, you don't have to agree with it but here goes.. If someone wants to smoke and it is not physically bothering you then I'd let them. I have learned in more ways than one you shouldn't try to change someone in a relationship, because then the relationship changes. My ex girlfriend smoked starting around 7 years old. Nothing extreme... when we got together she was 17 and smoked on occasion but stopped smoking when we got a place together. After 2 years she started smoking again on occasion for example I bought her a pack around thanks giving on year, she was still smoking the same pack Easter the next year. Because she smoked so little she started rolling her own which is actually much better non of the junk in them and i could tell the difference because the smoke didn't even make me flinch, as opposed to a normal store bought cigarette from a pack. She would never smoke by me she'd always go outside when she did but I usually followed because I was intrigued by it. We eventually broke up for other reasons after 4 years. But I think if I would have made a big deal out of it, that would have been sooner and for me I saw no reason to make a huge deal out of it.
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<br>The way I see your situation is YOU knew he smoked BEFORE he knew you had CF, so that was your chance to say this is a bad idea. He tried and seemingly in the end was unsuccessful at a permanent quit it doesn't mean he doesn't care about you and you don't seem to be saying that at all. Your problem is why we would he take for granted something that we/you struggle to hold on to day by day. I think the answer in it's simplest form is that people have the freedom and choice to do what they want. Everyone needs their "thing" smoking is a lot of peoples "thing". I'd say unless its overly excessive 1pk/day leave it go until it starts affecting you.
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<br>thats my two cents.