Sorry to hear that. I used to play the lesser of two evils game too. I think most addicts have attempted and failed miserably with it. It was not until I realized it wasn't the substance that was the problem. The substance was my attempted solution to the problem. I wasn't comfortable in my own skin and was using the substance to escape so until I learned how to live life sober it was just a series of failures.
Today there is no lesser of two evils. Every single substance that I use to escape goes in the same bucket. There is no hierarchy of substances. I can't say to myself it is only alcohol or only pot or at least it is only powder cocaine and not crack or it is just codeine and not heroin.
It took me a long time to come to that realization unfortunately. Stand firm on your boundaries.