Hi Petals,
I think this is a personal decision for you. I am Catholic, and I choose to receive the Blood of Christ during Communion. It has never created an urge to drink for me personally, because I believe it is truly the Blood of Christ, not wine. That's just my experience. Receiving Communion (in both forms or the Body of Christ alone) has definitely helped me in my road to recovery.
In my church, if you do not wish to receive the Blood of Christ, one simply bows in the direction of the Cup and walks by. Nobody notices or cares who receives and who doesn't, as there are so many reasons, besides abstaining from alcohol, that may influence a person not to receive. If you are concerned about etiquette for not receiving, you could always talk with your pastor or go to church, sit in the back, and watch how others handle it before it's your turn to receive.
Best wishes!