Yeah it sure is a slippery slope this whole alcohol addiction shizz. You have proven you can stop for an extended period of time so that is a huge plus.
Maybe write down why you want to stop completely and refer to it when you get the urge to drink?
I kept trying to moderate and control my drinking well into my 30's. I wish I had stopped late twenties when I knew it was a problem because experience tells me it only gets worse. This nightmare is progressive.
Post often on here and read around, this site has kept me sober with only 1 minor blip for 10 months and counting