Good for you. Both of my parents gave it up cold turkey when I was a preteen and they lived until age 71 (Dad) and 91 (Mom).
You no longer stink and will gain new friends. I had to work in a public building down the hall from the room where all the field personnel mustered at the end of the workday and most of them smoked. It filled the halls and my lungs and now have COPD although I never smoked.