My family "knows..." Well, actually, my family knows I drink a lot. They have no problem with that. They don't believe I have a problem...
I agree with what's been said... if you're overage and not living at home, and telling your family would unnecessarily burden them with a problem they cannot solve... no need to. If any part of that sentence does not apply... well, that's another story. And I figure once you're sober, it'd be easier telling your family... but maybe that's just me.