Originally Posted by
GreenEggsnHam 
But actually I haven't quit drinking yet
Welcome! While you haven't actually quit yet, you've begun to realize that the road you're on is not endless. I was in the same boat- good job that I'm good at, meeting all my daily obligations and the like, but unhappy none the less. Drinking was cheating me out of my future, and even out of my present.
And you're right, it can't go on forever. Most of will continue to drink as long as we possibly can. There is only one time to quit, and that time is now. This is because we live in the eternal now.
Most of us are given many, many warnings before things totally hit the fan. Undoubtedly from your posts you've seen the signs. How many signs will you drive past before you stop?
Even if you're not "ready" to quit, maybe you're finally ready to at least consider it.