Ideally you should avoid alcohol (except, perhaps, for the occasional glass of wine). Especially if you're trying to lose weight since alcohol is a sugar that your body will use before it touches anything else for fuel.
You need to learn to find stress release in other ways. Go for a walk or a jog. Do a handful of pushups or lift some weights. Find a way of getting a few endorphins that make you feel good without relying on things you have to eat or drink. That's my 2 cents worth of psychology