wow i was in your shoes. i used to drink about a bottle of vodka a day also. i tried to quit several times only lasted about 3 or 4 days. i also stopped cold turkey. i have been sober for 19 months now.
how did i stopped and stayed sober completely. for me,, i had to avoid things i did when i drank and people who i drank with. i developed new activities and hobbies.i had to develop a structured life such as eating good meals every day, and establishing a good sleep cycle.
i also came here every day to read the forums and post on here. this was a good source of help. at times i had to come here 6 to 8 times a day. at times in the beginning i i made the goal of being sober just for that day, even for that hour.
there is a chat room here that has good people there and who helped me out alot.
stay sober, you can do it!