Hey man. I smoked for about 2 years, 10 cigarettes a day or so. I quit, haven't smoked for about 12 years. Had a cigarette in my mouth with a girl some months ago, didn't inhale.
What was significant for me I think was a journal. I wrote the date, and then "Didn't smoke." It became a competition for me, to be able to write that line every evening before sleep. After a while it got boring, it was pointless, I got it.
I think it can be good to look at the psychology with smoking, and for oneself. For those addicted, it likely can be a defence mechanism. In your case, against what? Why did you smoke? What/when caused you to smoke? For me it was probably some kind of nervousness.
Also, feeling good because of smoking is a bit meh. It's like paying for sex or cheating on an exam or so. Not a win. Or feeling good because of being drunk. Well, I do drink (though these days I don't feel like feeling).
Regarding
@Pan87's comment: A smoke once in a while is not that bad in my opinion. It's just typically darn hard to keep it at that level -- the next day you wake up with that pack of smoke in the pocket and on it goes. I just have a zero-policy because it's easy and requires the least energy -- at the cost of, indeed, looking cool with that smoke or whatever. I agree it's a bit cringe to be some conformist, health freak moma-boy, but being some worn-out "rocker" is also. I was a young lost boy at a tango place in a city once, and one of the seniors grabbed a smoke with me. He used to smoke, got anxiety from it nowadays. But did it in order to bond with this lad, I think. Now that's a good reason to grab a smoke.
Maybe his method can be discussed.
I used to run to/workout when I quit, mostly do strength these days. Guess all distractions and replacements are good in principle.