I can relate. I am still very early (about a month from my decision) in this process, but I am not sure about telling my family either. It being surgery, so I probably will have to. Its not as though they won't notice something is up, but I just am not sure about their reaction. Is it better to "ask" for permission or for forgiveness? I know it will hurt them if I don't tell them, but they have never been good about being helpful on my other weight loss attempts. They do things they think are helpful, but truly aren't.
My friends have been great and wonderfully supportive. I have a couple of friends lined up to help/let me stay with her post-op. I have one friend that is supportive, but very practical, who has been asking good questions to make sure I have all the answers I need before I have surgery. My knee jerk reaction to her initially was I don't want to talk to you anymore, but then I realized that her questions were really valuable and came from such a good place. I have promised this friend and my boss that I will talk to my psych. about it and will follow his advice/plan of action about whether and how to tell my family. I have slowly continued to tell my friends.
I will not be saying anything at work beyond that I am having surgery. They will notice and I am sure ask after, but I'll deal with that then. Its truly not any of their business. I work in a terribly dysfunctional department so I dont' want to become any further a part of the dysfunction.