The trick to quitting smoking (or to changing any habit) is to recognize that your identity—that elaborate mental framework you devised in your mind and labeled “me”—doesn’t actually exist. It is arbitrary. It is a facade. And it can be raised or dropped at will. You are not a smoker. You are a person who chooses to smoke. You are not a night person. You are a person who chooses to be active at night and sleep through the morning. You are not unproductive. You are a person who currently chooses to do things that do not feel useful. You are not unloveable. You are a person who currently feels unloved.
Your identity is this made up thing that you’re emotionally attached to. It’s a mirage in the desert. A ketchup bottle in an empty fridge. And the quickest way to change yourself is to realize that there’s no real self to change.