So I haven't smoked a cigarette for 3 weeks but I found one and its like it would be a waste to just throw it away right... I might as well just smoke it one last time and THEN never smoke again?? But I'm scared if I smoke it then I'll probably go downstairs and buy a new pack and the cycle will return. But if I was able to stop myself for this long then surely I can do it again??
3 weeks is a good amount of progress, you wouldn't want to throw it away. You'd find another reason to do it again or buy a new pack like you said.. bin it or something.