Your situation is similar to mine.. Although my benders would only last 3 days as my stomach literally could not handle any more vodka. But my benders consisted of a 5th a day..
I go through bouts of sobriety as well, after a few weeks I think "hey why not? I can control this thing...." But inevitably I go back into the vicious cycle..
I've 1/2 hearted attempted to quit for good, but this time after becoming extremely sick my body just can't do it anymore. I'm on day 5, feeling better but the hardest times are now going to come, to keep abstaining.
It all comes down to how much do you want it. You can try AA meetings, keep away from triggers or situations that a result in consumption.. But there is no magic answer from my experience. See a doc, they may be able to prescribe meds to help ease the transition. Good luck.