Don’t hesitate to say no to a smoker and tell shadchanim that you do not want to be set up with smokers. When my daughter’s husband was suggested for her, I forgot to mention this very important issue to the shadchan. Suddenly, after we had already invested more than a week looking into his qualities, and the other side had already said okay, my daughter reminded me that I needed to find this out. I immediately called the shadchan and asked her, at which point she called the other side and was told, B”H, that no, he does not smoke, a very unusual case in his yeshiva. So obviously, since they’re already married (and have 2 beautiful children) the shidduch went forward, but we would have had no hesitation to stop it had we found out that he smoked. It is a habit that can come back to a person and even for the person above who said that they know of someone who now no longer likes it when others smoke since he quit when his wife got pregnant, he can very easily start again if triggers in his life arise, stress being one of them. I hope that he does not, but it is much easier if a person never starts.
BTW, don’t overguess HKB”H. He knows what is good for you. Have your priorities right and some patience and the right one will come your way. Just daaven for the clarity to see that it is him through all the mist that exists in our times. Hatzlacha!!!