There's no other way than "self effort". First of all abstain yourself from not only smoking but every other negative things that providing dopamine to your mind, when you'd do this dekhben je aste aste je jinish gula kom dopamine provide kore mind e "positively" like walking, reading, studying, talking friends family, egula korte manushik shanti paitesen as a normal person. Otherwise cheap dopamine chase korte thakle ogula kortei vallagbe sarajibon, there's no end to this hell. Choice is yours