You've made a couple "this is the last time" promises. I'm not saying this to throw it in your face. I've done it too, relapsed and promised to never relapse again.
Vows don't last. The hard work of recovery does. If you want this to be the last time, I hope you will consider doing something different. It doesn't have to be AA, but with AA, there are people there to guide you.
AVRT works for many, but as you said, you didn't get far with it.
Don't be too quick to dismiss something that really could make this your last relapse.