If you really want to stop but have failed, you might want to read Allen Carr's Easy Way to Stop Smoking. Sorry if someone mentioned that but I don't want to read the whole thead about people's different methods of stopping and failing to stop - I did scan a few posts - I can offer my own experience though... finally successful.
The problem is basically in your mind (it is actually possible to stop without pain or going through hell) and Allen Carr will help to explain that to you and help you get yourself ready to stop. I smoked a lot of roll ups for years (full time for about 16 years - I used them and basically enjoyed them in all situations : working, thinking, waiting, driving, coffee, beer, before meal, after meal, before bed). But I wanted to stop after I started to actually feel the lung damage and as a wheeze sound was audible if I took a deep breath. I stopped after reading the book in 2005. But then I gradually started again until I was smoking quite a lot again in 2006. Finally I was annoyed and fed up with it as I felt again the damage to my lungs and the returning of the wheeze and feeling some small pains. So I stopped again while on holiday last year (summer 2006).
By the way, part of Allen Carr's instructions are not to use gum or patches. You addiction is fueled by the intake of nicotine and so taking nicotine just prolongs your addiction, making it longer before you will be free of it. His method is all about simply stopping, but getting your mind ready to stop before you do it. Also choosing the right time, because just before a stressy time at work, or the completion of a project, isn't going to be the right time to stop. You use cigarettes for your mental conditioning to such an extent that you will not be happy if you are stopping while performing complex tasks under high pressure - and you will just start again.
For me it took a long time for my desire for cigarettes to go away. It was some months before I could work very hard without smoking. I even want a roll up now sometimes. But I can't go to the shop and buy some tobacco, because I know that I will just start to smoke again. I am happy to be free from the endless cycle of smoking and the gradual destruction of my lungs.