I'm a smoker. I used to hide it from non-smoker girls or just not smoke around them etc. I also quit a couple of times for longer periods of times, but it never lasted.
So now I don't apologize for being a smoker, it is who I am, if she doesn't like it, fuck her
I will quit smoking when I feel like it, not because she doesn't like it.
It does help to have some Airwaves Extreme around, and maybe some wet perfumed tissues for your hands if the smell bothers her that much. And I do step outside to smoke if it's prohibited in the venue we're at or if we're at her place. If we're at my place, I will smoke inside, but sit near an open window so I don't expose her to passive smoking. I do respect non-smokers for their decision not to smoke. Some girls are not bothered, but if they are, I respect that and will go outside. But I enjoy smoking, especially when having a drink, so she must accept it's a part of my lifestyle.
With some girls it might have a negative impact, but it can also be used to emphasize how alpha you are and don't care what she thinks about you. I have a HB10 friend who is really bothered by smoke, but she's dated smokers. She says, she prefers non-smokers, but if he's a smoker, well fuckit. So I think if she's attracted to you, she'll tolerate it.