yoyo- theres only one question here. Do YOU mind living with someone who smokes. Forget everyone else’s opinion on smokers it is completely irrelevant here. It’s your life and this is an important decision you have to make. You have to decide how much of an issue you believe smoking is and then decide if you can spend your life with someone who smokes.
I wish you much hatzlacha and whatever decision you make should be the best for you!