Do it! Tell somebody. I told my family and some of the guys here. They have given me excellent advice (not that I have acted on it, but I know what I need to do). I think by telling someone, you are admitting to yourself that you are drinking too much. It's like coming to MS initally. I had to admit to myself, "Yeah, Rich. You're mucked up and you aren't doing so well healing yourself. You need help."
I told my T that I thought I drank too much a few weeks ago. I hope yours is more receptive than mine was. Mine sort of whitewashed over it. "Rich you have been through a lot, and are dealing with a lot. I don't think it makes you an alcoholic because you drink everynight to take the edge off." Maybe he is right, but I know that I feel the need to stop. You must also feel the need to stop. Who knows better than you if you're drinking too much? Tell your therapist!!
Take care of yourself and stay safe!