I smoked for years and gave up 5 years ago. I decided I didnt want to and got to the end of that day, with a few tears shed along the way. When you get past that mark everytime you feel like a cigarette you just say to yourself that would be a waste of the day you gave up. It worked for me, and I have have a very addictive personality.
After I gave up smoking I gained more confidence and spoke up for myself cause I felt like I was capable of anything. Its not easy but very achievable.
I am a big anti-smoker now, dont go giving yourself a date to give up, just do it now. Smoking is very very antisocial now, it does make you smell bad, it also effects your personal smells and taste to.