I smoked up to three packs a day between the ages of 14 and 28. I quit just before I got married. My 25th anniversary is coming up on July 11.
There is hope, but you have to imagine that the freedom from smoking is worth more than the temporal gratification. The same can be said for many things in life - marijuana (been there, too), pornography, etc, etc, etc.
FWIW, ex smokers ARE the worst when it comes to being around current smokers. We know where it can lead. My father died of emphyzema at the age of 75. I'm sure he could've lived much longer had he not smoked.