interesting. How DOES one make the best of it when 95% of her life is unhappy.
If you can come up the answer to that dear girl you will be a multi-millionaire.
He's a DRUNK! He's breaking the family up. NEWSFLASH! This already IS a broken home! HE BROKE IT!
He is a controlling abusive drunk of the worst kind, and by the sounds of it your family aren't exactly the best of the bunch either. Why do they want to see their own daughter/sister miserable, slowly killing herself with an eating disorder.
Love you are trapping yourself in with a person who doesn't have anything else in his head but alcohol. This will possibly kill you in the end, or at least kill off your hope and when the kids leave, you will be stuck with him. The kids will try to help when they realise what a mess this is, but in the end, if you don't leave, they may just give up, or worse decide they can't handle you living like this and leaving you to it.
Wake UP! Take decisive action. Even if he stops drinking, he'll STILL be an abusive controlling ogre, just a sober one. You are making excuses for his abuse, putting it down to the drink. It's nothing to do with it.
Read Why Does He Do That. Your H is in there.