I've been a smoker twice. The first time I just up and quit cold turkey and stayed off them for a couple of years. It was easy. That was when I was in my 20s.
When you are older and smoking is part of everything you do, it is much much harder to quit. I wanted to quit for a few years, couldn't smoke in restaurants or bars, getting burn marks in the furniture and the car, expensive, turned off the ladies... it just interfered with my lifestyle. But it is extremely hard to break the habit when you have been smoking a cigarette every 20 minutes for 20 years running.
It's not just will power. There are a bunch of tools available to you, use them, find what works, incorporate multiple tools if you need to do so. The objective is to quit, not to impress anonymous forum clowns with your vulcan-like powers.