Quite a few people I know who are also fading felt like that at some time or another. I'm always on the verge of breaking.Its very hard trying to pretend with your own family. I think that time will be on your side, as long as you look after yourself first though. If you're not ready to deal with the inevitable backlash from completely leaving the dubs, just go about playing the role of the spiritually tepid. That will dissuade non family JWs from engaging with you and more importantly it will not evoke a crisis situation with the family. I'll be honest with you. If you have all of your family in the dubs the fading will never end. You'll have to decide whether that sacrifice of some of your freedom is worth it, or if you'll be happier accepting a much a cooler level of interaction with them.
I've slipped up quite a few times lately with my family and told them some of the troubles I have with JW doctrine. I regretted it. But in your case since you didn't directly tell the JW family yet, just tell the other person to please keep mum. If the family has already heard, then just be prepared to tell them that you were just so overwhlemed with work etc. That lately you felt drained on all levels. So to keep up your 'spirituality' you were just practicing a suggestion the Society had made. They 'encouraged' us to re-examine our beliefs and to try and prove the Troof to ourselves so that we can "truly make it our own". You wanted to do a thorough job, and so you were just playing devils advocate with some counterpoints. For a bit you were genuinely wondering about some of the stuff you came up with. You inadvertantly bounced some ideas off of someone else but you've since gotten satisfying answers to your questions. (Just avoid at all costs telling them which side you've settled on).
Use as much WTS lingo as possible. Let them conclude that the dub world view and paradigm is still your reality, you're just not one of those 100 percenters...more like the 30. I really don't feel good about myself when lying to my family, so I can sympathize. I really feel for you. Hang in there. While with fading the dub crap is always going, you do get some very nice long periods of utter peace from it all.