This is resonating with me today! I know I'm getting nicotine, but something is going on in my brain!
Like others have mentioned, I needed to have a cigarette-free environment. I smoked my last one and then just dug my heels in and refused to buy another pack. It wasn't easy for me. But every morning I wake up and make a vow that I won't smoke that day, and sort of walk through the strategies I have in place to avoid cigarettes (e.g. loading up a few flavors, making time for a walk, waiting for that urge to pass). If the urge is really really strong I remind myself that it won't be the same - cigarettes will no longer taste the same. And I remind myself that the urge will pass.
I think the hardest thing for me to deal with is how sad I feel. I get that there are chemicals sloshing around in my brain, fewer receptors and all that, but sometimes the heart doesn't listen to the head.
Quitting cigarettes hasn't been easy for me. But this forum has been so helpful. I visit it every day and get inspired to keep going.