The issue is nicotine addiction. You are a drug addict who centers your entire life around administering a drug 7500 times per year (if you smoke a pack a day).
The actual mechanism for stopping smoking is simple. You just don't buy cigarettes. Don't light a cigarette. Don't put it to your lips. Never take another puff and you are 100% guaranteed to be a successful, permanent non-smoker. Trust me, everything about being a non-smoker is glorious compared to smoking. And, I know. I smoked for 38 years.
The problem is that you are going to have to pay a price to quit. Think of it like a broken arm. Hurts like heck at first, probably bothers you for a month or two. You know, however, that it is healing and will eventually be as good as new. Same thing with quitting smoking.
Quitting isn't half as bad as imagining what quitting will be like. You just educate yourself about what to expect, get ready with some easy tricks to overcome a crave, and then make a personal committment to never take another puff. Each hour makes the next hour easier. Each day makes the next day easier. Each week makes the next week easier.