I agree w/ LTD. I have found strength in having boundaries - knowing what my limits are in any situation - when I practice them for me - when I keep my cards close to my chest and protect myself!
If instead I develop the habit of going around stating my boundaries to loved ones then I (because of my old codie habits of mind) am probably setting myself up for an expectation that my boundaries will be respected,and putting the power in someone else's hands and then, if I really forget all I've learned, feeling resentful or p.o.'d when my boundaries are "violated" or "not repected."
My boundaries are for me - and as I quietly stay true to myself my borders are quite well guarded but allow free passage to all non-hostile travelers! Leaving heavy drinkers to their drinking is an easy one! "Byeeeeeee, gotta go! Love ya!" I don't think they miss me much, and I have spared myself pain & discomfort and gone off to do better things!
peace-
b