Okay so I smoked for 3 years almost a chain smoker too which is why I quit. So what I did was within the span of 3-5 weeks that's how long it took me. The first week I would limit myself like 5 a day then the next week down to only 4 a day, then 3, 2, until I was only smoking 1 a day. Not saying that will work for everyone but it worked for me.

I still have dreams of smoking when I'm going through stressful times, you just have to become dedicated to a lifestyle change and journey into better health so not to fall back into the old habits. Good luck OP and all who are trying to quit.