Very common (which is a good thing because it means you are not alone!). Lovely, sparkly, handsome successful Alcoholic bf can go weeks and months totallly fine, then boom....nonstop sick bender for days, weeks, no bathing , sitting in his own vomit and urine drinking nail polish remover when the handles of booze run out and he's too blacked out to get to a store.
Alcoholism is insidious. It's the devil. A big part I believe why he has trouble quitting is just that. he believes when the binge is over since he's not craving it he must be fine - that he can control it bc he doesn't want it today. Sure until the next one hits without warning.
Keep posting and reading the boards and you will get some good advice! Also, don't stress too much about replying to each person (unless you want to of course and have more questions!) as there's also a nifty little "Thanks" button if using a desktop
you can get so many replies it can be hard to get to everyone. Important part is that ppl are listening and ready to help!