What everybody else said... Lots of good advice.
I have 2 analogies that resonate with me.
When you smoke, you become this person who is highly addicted to the nicotine and the other chemicals, so day by day you change in to a monster, a werewolf.
When you know that nicotine can be as addictive as heroin and cocaine (damn you cigarette manufacturers), you start to understand.
If you are a control freak like me, who chain smokes to get a constant hit of dopamine and smoking is EXPENSIVE, you start getting angry. Now you have to go through the whole process of "unmonstering" yourself.
The other analogy: Sure you know the game of snakes and ladders, you move block for block but you can only go up or down. Every time you go down a snake, you start "losing" and your opponent (nicotine) gets ahead of you putting you even lower down on the board. No fun!
There are natural ways to boost dopamine and in my humble opinion it is both vital and essential. Be good to yourself and take pleasure in the activities that bring you joy. And good rest at least 7 hours (solid) a night.
For some of us one one is too many, and 1000 are never enough. You will need to be on guard till the day you die. Forgive yourself for all the stop starts, you are human, and it's never easy. If you are finding it all too much go and speak with a professional who can assist you with meds, supplements, or a "toolbox" to cope. And if you are feeling a little down that's totally understandable too.
Wishing you the best of luck.
p.s. a list below of natural dopamine boosters, and don't forget ORGASM is a huge one too