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

Ron , quitting nicotine is the hardest thing I've ever done in my whole life. At one point I was smoking, chewing and on the patch trying to quit. The patch didn't do anything for me so that was the first to go. Then cigs . I chewed for another 20 years or so. . I'd quit for awhile and start back up.
Then the vapor deal most recently. That was a pita, with keeping all the BS charged up and working. Finally just quit it all for good. You can do it. But one smoke and it's all like you never quit.