Obviously you are DOING IT WRONG.
And every time you fail you shoot yourself in the faith yet one more time.
What I see is you have now conditioned yourself to fail.
So do you really want to quit?
You come here and profess your desire and yet you are smoking the next day.
When is something going to change where you actually believe what you say?
That's what it's going to take. Lip service isn't helping you. Get some cajones and stop making excuses.