I was hooked on a 2 pack a day habit, 3 if I was drinking. I spent over 2 years trying to quit cold turkey - I'd make it a few weeks, and then fuck it up.
Finally I made it. It's been 11 + years since my last smoke.
When I'm awake I never have anything other than contempt for smoke. I don't allow it in my home or car ever. But at times I still get nightmares about smoking, and I wake up paniked and depressed about blowing my no-smoking streak. It takes a few seconds to realise it was just a dream. That happens less often as time goes on.
Good Luck.