Tori,
Look around and what you see are alot of people who realized years into a marriage that thier SO was an alcoholic. Some of the A's have quit some have not. What you will NEVER READ HERE is how it GOT BETTER OVER THE YEARS WITHOUT QUITTING. It doesnt. They either quit, or eventually, as it is a progressive disease they die.
Tori, there is a heck of a lot of heartache along the way. The inability to sleep is his system being not only use to alcohol but requiring it. His need for sleeping pills compounds the problem. It shows his tolerance for alcohol is increasing, which will require him to drink more. Dont worry in a few short years they are able to embarrass you with less alcohol.
By this time you may have years invested, and you will not leave because you hope against hope that this will be the year he quits, acts responsible, and begans to treat you better. But it wont be. Perhaps next year....
It may not go this way at all, he may quit within a a week or so, or perhaps hurt someone while driving drunk....My point is this...You dont know...Listen to Clyde, and RUN, do not pass go, just RUN.