I dont think that anyone who has a problem with alcohol can ever drink safetly again.
I think everyone here knows how you feel at the moment, you are scared for your health but cannot imagine a life without drinking.
I have first hand experience after having given up drinking for a full 3 years, I slipped back into it 3 years ago after some personal problems telling myself that I had proved I was not an alcoholic and would be able to handle it safetly NO NO NO! i am now the same old drunk I was before I stopped. (Read my post titled "I made a big mistake")
I am now on day 3 of not drinking again and this time "deep breath" I will not go back.
I hope you can find the courage and strength to give up altogether, I feel great this week through not drinking and am keeping a diary everyday so that If I do feel the need to drink then I can read about how good I feel when I dont drink.
Good luck,
God bless