Although they say it's better to just have a couple of drinks per day, a lot of people do drink like yourself. They don't drink during the work week and then like to party a little on the weekends. I don't think you are hurting your liver by doing this, since you are giving it a rest during the week. Also, taking a lot of vitamins, includng Vitamins B and C, reallly helps keep your liver healthy. Milk Thistle is an excellent liver cleanser. I drank a lot more than that for a longer period of time, and after I cut back, I had my liver checked and it was fine. I don't think you have anything to worry about.