I've been a 3+ pack a day smoker for 35+ years. Haven't had a smoke for 45 hours.

I'm cigarette free but not nicotine free...I've substituted(partially) with something else lol. It's legal here now...
Used to be pack and a half a day. Smokes now are $16/pack!! I've quit several times before. Tell yourself your DONE. Part of the mental exercise. As of right now(and forever) an EX smoker. No drags nada. Fair bit of mental toughness involved.
Good luck and you got this. Remember what you said about the young lad.