I think telling your family anything at this point is unnecessary. If they begin to notice you aren't drinking, I like the idea of telling them your Uncle's death scared you. And that you just aren't enjoying drinking any more. Then you'll get a feel for how supportive (or not) they would be if you told them you think you have a problem. If it seems they are going to get super judgemental, you can keep that information to yourself. You might be surprised, though. They might be really supportive. And I wouldn't worry one bit about what any friends might think. I was worried about that at first, too, but all of them have been really really great and supportive, and some have even asked me how I did it and said they think they should quit, too. If anyone gives you crap about it, then you know how much of a "friend" they really are.