You can do it! I smoked for 16 years up to two packs a day! I had to quit as I had nasal surgery and it really, really hurt to smoke. That was enough incentive for me!
DH continued to smoke for 8 more years after I stopped. After my surgery healed up, it was quite hard sitting in a room with DH when he lit up, as it was very tempting to grab one of his smokes. After a while, the smell just grossed me out!
He quit two years ago when he developed pneumonia. He tried and tried to light one up but his lungs would not let him for over three weeks! He decided that if went that long involuntarily, he could probably make it. He was right! He started chewing cinnamon gum instead of smoking as he needed "something". He is still chewing that gum, but to a much lesser extent. I would like for him to drop the gum chewing completely but he has not developed any cavities from it, so who am I to complain?!
I've been "clean" for 10 years now and it is great! The respiratory infections have almost come to a complete stop. Best wishes to those of you who are trying to quit.