Nicotine is more addictive than heroin... And like gambling and alcohol... You never really do quit and relapse is always a possible outcome.
It’s not the nicotine, it’s the habit you are in and it takes over your mind. I’m almost at 7 months and now finding useful things to fill the void of the smoke breaks. I do miss it though, I did the best planning on my head on my smoke breaks.
I smoked cigs for about 15 years. I don’t miss it. Quit about 35 years ago. I could smoke a cigar and not relapse.
Having quit 3 times cold turkey before it finally took I can say that nicotine is definitely as addictive as any narcotic.
I have not smoked a cigarette for 27 years and can’t imagine ever wanting to again. But I’d be afraid to smoke even one because you can get hooked again in a week or two.