Susie,
I do not know what to tell you. When I quit smoking it was because I truly never, ever wanted to smoke again. I quit cold turkey and never looked back. Each person is different. My neighbours keep trying and succeed for a few weeks then lapse back. What helped me the most was supportive non-smoking friends. I also (for a few weeks) avoided situations where I would want to smoke. I wish your friend the best of luck. It is difficult to quit. You are a wonderful person to want to help. Your friend will appreciate that.
Jennifer
“Live as if you were to die tomorrow. Learn as if you were to live forever.”
-Mahatma Gandhi
"We are what we repeatedly do. Excellence, therefore, is not an act but a habit."
-Aristotle