I drink lots of alcohol nightly, for the past 4 yrs. It never affects my job, life or driving.?

I drink each night, 1 bottle of wine and a 6 pack. I get drunk and fall asleep. I never miss a day of work, i pay my bills, i live my life. i am responsible and i have great credit. so if i drink each night but can function well.. do i have a problem?