That's kindof like trying to quit smoking cold turkey. It's killing you, and you know it, but you still have to make the transition gradually.
Some people are chemically dependant, some smoke through habit, most are a combination of both. Knowing which applies to you can really help you quit and there's questionnaires that can pinpoint which you are.
Sample questions:
Do you smoke a cigarette when you wake up? (low nicotine in the blood)
Do you smoke after a meal? (force of habit by mental connection)
I smoked to wake up, to go to sleep, to be alert, to relax, to suppress hunger, to get an appetite to think, to take a break or to sooth the lonesome heart. I really loved smoking. Still dream I'm smoking (and feel guilty) about once a week.
It is more like changing your brand of cigarette.
Clearly not a follower of logic, are you?