Quitter since 2006. No nicotine no alcohol. Only couple of months was tough in the beginning. Just a matter of habits lol.
I had trouble quitting cigarettes too, but kicked them pretty easily when I started dating a non-smoker. It's nearly impossible without a good reason though, I'm at ~4 years now
You can only quit an addiction if you have a good enough reason period. A good WHY? (reason to quit) will carry you through every single obstacle and hard time.