One day at a time ... what helped me quit over 10 years ago was knowing I had a choice and chose not to smoke. That kind of empowered me. 4 years ago I had a crazy summer and started smoking again. I wouldn't buy my own packs and only smoked on the weekend. That lasted for a month. I then started having 1 or 2 cigarettes a day and found myself buying packs. As soon as that started I decided to vape and haven't looked back.
TNT you'll get there

one day at a time.
^ THAT
I've been yo-yo dieting myself up and down the same 5-10 lbs for the past few years due to living a pretty sedentary life (injuries, medication that causes gain, yada yada yada). One of my best friends is a nutritionist/personal trainer and I would gripe and gripe and gripe, cheat on the diet and I'd ruined the day and then I'd decide I'd want and start again next week... and since I had a bad exercise day it wasn't worth it. He asked if I was insane. I said "WHAT?" He asked if I really expected to wake up tomorrow or the next day or some date I set on the calendar and be a non-smoking, drink nothing but water, eat nothing but whole organic foods, never drink again, run a few miles a day health nut. I said "Are you friggin kidding me?" (except I used far more colorful language in new and interesting ways.) He asked why I was kidding myself. Why was I setting myself up with all or nothing failure? He told me the only thing I have to try to be today or tomorrow or next week is better than I was last week, or yesterday, or today. If I could do that, then I was making progress. Well, that was 24 lbs, and God only knows how many avoided cigarettes ago. I've learned that I'm human..... a slip does not have to be a landslide, I do need to give myself a break and enjoy things if and when I want them if I choose to. Not if I'm allowed to, but if I make a conscious choice that it was worth it. I may only lose 1 lb this week because I had French Toast this morning. I decided it was worth it. I didn't cheat, I made a choice. Then I chose to stick to the menu I normally do for the rest of the day. It's OK with me. As long as you're doing better than you were for the past however many years you smoked, you should be OK with yourself.