Tiffany, I do not think that your friend is trying to undermine you on purpose.
As Babs said - she is scared, I think. My guess is that like you - she fears that your precious time together, your gentle timeouts together are under threat. They are not. Those times and her friendship are important to you. It might be worth telling her that.
Secondly - she possibly thinks "Here we go, miserable Tiffany for a while, then she will smoke. Why doesn't she accept that she likes smoking and stop putting herself through it?" She maybe believes that giving you a cigarette will save you the misery.
I would suggest that this second one feels genuine, but it actually driven by a deep fear....
"What if you quit? What if you quit and smiled while doing it? What if you quit and still sat on the porch chewing the fat, not smoking, but still smiling?"
Panic sets in - "My God - that means that smoking is giving Tiffany nothing! Does that mean it is giving me nothing? Oh my God!"
Tiffany - I might be wrong. I might be making this up. I am, after all, a fat guy in a skirt.
But:
I might be right.
Smoking gives you nothing. You are giving nothing up. Read the book slowly - and think about it. There is absolutely nothing that you do now smoking, that you can't do as a non smoker. You will just enjoy them more as a non smoker.
And (whisper it) your friend will follow you to freedom...
Go for it Tiffany - you won a massive victory. The physical addiction is almost dead now - as you have worked out - you need to deal with the head thing!