It irks me that smoking is portrayed as "a habit"... If it is, so is cocain. Both are addictions and some say that nicotine is actually more addictive than cocaine. And, like all addictions, your brain and your body will be telling 'you' that smoking is good and that you HAVE to have another cigarette and that it's OK to smoke 'just this one'...
But, that doesn't mean that it can't be licked.
But, like beating ANY addiction, it takes planning and resources:
-- Have you thought about the nicotine substitutes?
-- Like AA tells us: kicking "the habit" involves a change of lifestyle (do I here a bike in the future?)
It's hard work -- but it can be done. And yes, you can do it...
... But, for me, it came down to wanting something more than I wanted that cigarrette.