Booooooooooze is evil

It's ruining my diet and I'm so frustrated.  I've been working out 3x a week (2 major aerobic/weight conditioning classes and an extra cardio day), I have been pretty good about staying under 1590 calories a day.. but then I drink.  I'm guessing the booze is the reason I've been losing and gaining the same 3 pounds for a month.  I practically starting crying when I looked in the mirror in the locker room today.  This SUCKS. :(