I had this problem too, and I didn’t even know why I was smoking cigarettes yet I’d smoke a pack a day. I realized I had to make the choice to stop, not just thinking someday I would. And that meant deciding not to give into the cravings and buy another pack, it meant not driving around by myself if I didn’t have to because I know I’d smoke the whole time. Find another way to occupy yourself or handle your feelings. You have to know and decide that you’re stronger than the addiction and fight it because you will realize that after time passes, the cravings become less and less and you won’t even think about it anymore. it does take time to get there and you will probably go back again, but don’t lose hope success isn’t linear. Keep going and you will see the beauty in not having to depend on anything to be happy