I truly like these people and they havent try to preach to me (eventually they will)... any ideas in how to break it to them...
I would keep the relationship on a professional level. Note, even professional acquaintences may have lunch, share a beer or two, play 9 holes, etc. I would be cautious that religion is never brought up unless they initiate the subject. That then invites you to ask some thought provoking questions about issues you have heard from others about JWs.......things which could get them thinking and which may require them to investigate in an effort to satisfy your questions. Generation changes.....UN involvement.....etc.
If and when they learn that you are DA and (are perhaps upset that) you did not reveal such info to them, you can easily reply that YOU kept the relationship strictly professional and that it was THEIR choice to initiate the subject of religion into the conversation. You only responded to their invitation. Since you are NOT part of the JW denomination, YOU have no requirement to shun them nor to advise them of your DA status. Those are JW rules. You are not a JW. You have chosen to treat all persons impartially and fairly regardless of their personal religious choices of affiliation.
Surely they will have already concluded that you are a very nice, genuine, and sincere person. So, why should you be shunned over your personal beliefs and thus doomed to destruction (and having your eyes eaten by the birds of heaven)?
DOC