Such drugs make the brain become dependent on them. The very worst, if you can believe it, is plain ol' nicotine. The brain has two main types of neuro-receptors, muscarinic and nicotinic. The brain actually makes its own form of nicotinic neurotransmitters. When we smoke, we encourage the brain to begin to make less and less of what it ought to produce on its own. It's no wonder people cannot quite smoking, at least not with an insane amount of support, will power, and sometime substitute behaviors.
Anyway, you can wean yourself off the bzepines but it takes both determination and a methodical approach. You start with a teensy reduction, go a full week on that, then another teensy reduction, another week, and so on. It might take up to six months to get off them fully, and there might be some stubbed toes along the way. You must have an open mind to the thought of getting off them, and you must only act with the advice and monitoring of a competent physician.