Yes, there are several of us somewhere in the middle. Not all of us are the same, either -- some think of themselves as cross-dressers, some as androgynes or genderqueer, some as non-op transsexuals -- and for most it takes quite a bit of time to figure out where they fall. It's not at all clear that the lines between these categories are nearly as sharp as they may seem at first glance.
The question on whether, or when, to tell your family is a hard one. On the one hand, if you tell them it will be a big shock for just about everyone, and dealing with it will take a lot of time and effort. It may also lead to the family breaking up, but it does not necessarily have to. On the other hand, at some point keeping this from them will become the big lie in your life, and that is even more likely to lead to the family breaking apart. I guess the bottom line is that rushing things is bad, but delaying too long is just as bad. Whatever that means in your case is ultimately for you to decide.
Good luck, and welcome,
Nfr