This question comes up often. It isn't possible, or at least not without many, many years of consistent, sharp douchebaggery to sour their feelings. Even then, you can't really count on it. Look at the people who still fund their loved one's rehab stays after they stole tens of thousands of dollars from them in the throes of addiction, or who stand by them even after they've committed terrible crimes, who hold out hope for meeting them again after they run away to join the circus and go missing, who think they're the best person in the world even if their loved one is a total loser by anyone else's standards... If you're lucky enough to be blessed with a good family, that bond of love is stronger than time, memory, death. Being aloof for a little while will change nothing; it will hurt no matter what. Either they'll beat themselves up for not intervening when you became aloof or they'll beat themselves up for not seeing through an apparent facade of good cheer. This is not to sway you, it's just facts.
Some will say that having even one person who loves you is enough of a reason to delay CTB. I can't make that decision for you. I would just say that If I knew my time was short, I personally would want to spend as much quality time with my loved ones as possible.
