Jennifer, quit now. I promise you, you won't regret it. I'm soon to be 48, have always been an athlete, and always smoked and tried to quit. I started smoking in college; as a dance major, so many dancers smoke...so I did, too. I quit for 7 years and started back 5 years ago while going through a divorce. Funny thing is I quit for those 7 years during a separation to the same man I divorced 5 years ago. Please, please do yourself a favor and experience your life for what it truly is and can be; not enslaved to something that does nothing but poison your beautiful, young body! If you think your life won't fly by, you are nuts, and you don't want to be one of those who 20 years from now is blogging on a forum telling people you wished you had listened to all of those who told you to quit when you were 20. It was yesterday that I was 20 years old...