I quit 6 years ago. If you allow me to give you advice, for you to stop definitively, it must come from inside you and not from the outside.
I STRONGLY recommend that you read this book: https://www.amazon.fr/Allen-Carrs-Easy-Smoking-English-ebook/dp/B0051XSN50#:\~:text=Allen%20Carr's%20Easy%20Way%20to%20Stop%20Smoking%20(English%20Edition)%20Format%20Kindle
I know how you feel. I go to the roof to smoke secretly, but I am sure everyone knows what I am doing. I just read Allen Carr's Easy Way to Stop Smoking. It costs $2 for the kindle edition and you can read it on mobile/computer. I figured even if it is useless, it can't be costlier than smoking a pack a day. I was hit by cravings a couple of times yesterday, but so far today, only slight craving. I am going to drink juice as /u/Hootinger suggested whenever I get cravings.
Start taking care of your body now, don't be like me and wait until you're old and fat and have bad knees. I got the weight off, but my knees will stay bad forever. Find a sport or some form of exercise you like. Don't smoke or drink, it's really not worth it. Read Allen Carr's books about smoking and drinking if you need to quit. Watch some videos by Dr. Jason Fung if you need to lose weight.
Have you read Allen Carr's book? Worked like a charm for me, after a great many failed attempts. 25+ years smoke-free now.