Have you considered looking into the book 'Rational Recovery the New Cure for Substance Addiction'?
The insights in that book really resonated with me, because of the perspective I gained from their description of addiction and the mechanisms that drive it.
After reading the book and looking back on all my attempts to quit prior to reading about their method, I was amazed to see how closely it described the battle in my head or thinking.
That perspective is a great tool to use to set a plan and help change thinking.
wish you well