Einstein's definition of insanity.is "doing the same thing again and again and expecting different results."
It's a pain in the lungs to keep smoking. It's a pain in the butt to keep failing.
help yourself. figure out why you keep going back. Stop saying "oh, it's ok.I'll just start back up next week" How does smoking more help you quit? All you do is reinforce your desire to smoke.
Start thinking of yourself as someone with a brain who can make choices instead of a "helpless addict."
The addiction is to the drug. If you stop using the drug for a number of years the receptors you've sensitized to nicotine have long ago died off. My understanding is they die off within the first year similar to skin cells sloughing off and being replaced with new ones.
That leaves the habit. What is the habit?
The habit is the memories of the hundreds of thousands of times you smoked. The hand to mouth motion, etc. There were strong emotions connected to some of those smoking times. When you feel twinges of or those sme emotions, you may be triggered to smoke
You can unlearn the habit and be through the worst part of quitting in about 4 1/2 months if you don't keep giving up and feeding the nicotine receptors. (sure beats taking 40 years to unlearn don't you think?)
Stop thinking of yourself as an addict with little hope of succeeding and start using your head to move ahead.