Do you miss it? I once got into a casual conversation with a delivery man, who mentioned that he used to smoke but hadn't touched a cigarette in ten years.
"Do you miss it?" I jokingly asked.
"Oh yes!" he cried, and it was obvious he was being serious. "Every single day of my life, I kid you not!"
I miss it.
I quit over forty years ago. For several years I would dream that I had forgotten that I quit, that I bought a pack, and that I smoked half of them before remembering that I quit.
It was about ten years after quitting that I no longer looked forward to sharing an elevator with a smoker. It took that long for the pleasantness to subside.
Also, I seem to recall that the health statistics for ex-smokers begin to resemble those of non-smokers after about ten years.
Tell your delivery man to hang in there. It continues to get easier.