For me, I've seen alot of A end before the 6 month mark (in life and around other sites).
I think what's most important, especially for the LBS is what you do when the A is going on. You don't have to sit back like the ugly kid at the dance hoping to get noticed. Whether you feel like breaking up the A or not, that's up to you. Like establishing boundaries. That's fine to establish a boundary, but I haven't seen many people follow through on consequences once the boundaries have been crossed.
You can choose not to be a doormat, or whatever. Just because the WAS chooses to go out and have an A, doesn't make you a doormat.
Just my .02.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.