It's hard to say if your family will give you the cold shoulder or not. Some of my JW family still talks to me. They realize my disassociation was my choice and I'm a grown adult. However my parents haven't talked to me in about 7 months now, and act like I'm an evil person for quitting.
My advice is let it go until you feel confident in telling them you are through. Giving half truths always comes back to bite you in the ass. When they ask just be honest, or change the subject. But eventually you will have to tell them it is over. Either you live by their rules or you don't. No use wasting time half-assing it for the sake of others. It's hard but you will be happier for it.