this may sound kinda silly but it worked for me. When i quit smoking, I bought a big box of toothpicks and used those as fake cigarettes. Even went as far as to hold one like a cigarette, bring it up to my mouth, "inhale", etc. I was breaking the physical addiction to nicotine but still had the mental one, but after a month or so, I didn't even need the toothpicks anymore.

just something to try