You can do anything, but only if you WANT IT enough
Giving up smoking, getting fit, overthrowing a government, etc. The trick is, YOU HAVE TO WANT IT. Not as in "My doctor told me..." "I should lose some weight..." or anything like that.
I'm not minimizing the magnitude of the task, I'm emphasizing it! It's a terrible addiction, one of the worst. Therefore one has to want it almost more than anything. ""I should" won't be enough. Yet if you truly want it, you WILL make it happen. There's nothing special about those who successfully quit, and they endure those cravings the rest of their lives.
So ask yourself... do I really want this? If so, you'll do it. I wish the very best of luck to you, it's going to be a hard road. If not, well, don't bother "trying to quit." Token attempts only empower you to excuse your failure. "Hey, I tried..."
In my wife's case, she quit more than once for years then picked it up again. Then she watched my mother die slowly in unbelievable full-body pain (Hypertrophic osteoarthropathy, secondary to lung cancer. http://radiopaedia.org/articles/hypertrophic-osteoarthropathy). She quit and has stayed off.