Same here. Nicotine is perhaps the very worst drug known to humankind in terms of addictiveness:
* High lasts the shortest duration (a few seconds after the last inhale)
* High has a high physical factor (relaxation) but a low psychotropic factor (mood-altering effect like alcohol or mj), which is the opposite of something like psychedelics (which can be useful in curing addiction)
* High requires a physical adaptation (smoker's hack) to be felt most fully
* That physical adaptation is challenging to undo and takes at least 1 month (in my case 2) before cravings are replaced by disinterest or dislike
So the last 2 points were key for me. If anyone reading this is struggling, I highly recommend intermittent intense physical activity as a way to hack the physical adaptation process.
For me, squats work best. Go to the gym and try to get 15-20 reps of a weight you can manage, for at least 2 power sets. Something like: 95x10, 135x20, 135x15. I find if I do those at night and come home, my body rejects the thought of smoking because I'm already high on life. It also rejects alcohol to some degree which is nice for weight loss.
Once you've felt that lifter's high (not sure what to call it), you start feeling in control of your body's repair process. Then you notice it on the fun days too, like chest day. After 2-6 weeks, you'll likely find that cigarettes don't do much unless you smoke a couple in a row, but then they mostly make you sick, and you might find yourself going a day or two and forgetting to smoke.
Hope this helps someone.