Regardless of whether he has a problem with drinking or is an alcoholic, he knows you disapprove but continues to choose booze over you. First, I would be asking myself if this is the kind of relationship I want. I do not think you are the "one with the problem" and if he is unwilling to change...
That said, he appears to be displaying similar patterns of behavior that I used to do. The lying, the sneaking off to the bar, the over the top binges, not answering calls, and disappearing for whole nights. IMO, this is not normal and points strongly to an eventual drinking problem if it isn't there all ready. Almost everyone swears off alcohol during a hangover, however, it takes real commitment and action to stop.