I smoked about a pack a day for 28 years, starting at the age of 18. I NEVER thought I would quit; I loved smoking. I loved the first cigarette in the morning, and the last cigarette at night. I loved a cigarette after meals, and I loved taking smoke breaks at work.
And then in the summer of 2009, I for some reason became convinced that cigarettes were harming my body. I had experienced several cases of what I thought was severe heartburn, which I later found out were probably mild heart attacks, but I honestly don't remember ever connecting those symptoms directly with smoking. I had also been experiencing periods of tachycardia for more than 10 years at that point, maybe they got worse? I really don't remember. But for some reason, I decided that I needed to stop smoking.
And so, on the opening day of football season, 2009, I had two cigarettes spread across the day, and I have never had another one since. It was just that easy. And now I can't stand the smell of smoke, and have no desire to smoke, ever, for any reason. So I think it's pretty much like anything else in life; if you want to do it, you will, and if you don't want to do it, you won't.