Lifeisworthit,
I think you'll meet many "high functioning" people just like you here. I managed to hide it from just about everyone. I am a busy mom, successful in my work, active in our school, community and church, but I was deadening myself with wine late at night, literally amid the laundry and dishes, as you describe. Even my closest friends didn't know. Late at night I was pouring wine into plastic cups secretly and hiding them so my husband wouldn't know how much I was drinking. Telling him I was quitting, but then hiding it completely.
You may feel your have high tolerance now, but you'll drink more and more, and little by little your mornings will start being harder and harder, your sleep less restful, your workouts harder, your chores more exhausting. Alcohol makes your life get smaller and smaller, down to the bare minimum.
That's no way to live. Your intuition is telling you you're on an unhealthy path. Good for you for listening to it!