I just told my close friends and family then shared it with acquaintances that I actually see. The rest took care of itself since, as someone mentioned above, people talk. I actually created a new Facebook and shut down the old as I DIDN'T want to explain myself to people I knew years ago who I would likely never have contact with again. When I refriended the people I did want to know, I sent them a short private message on Facebook explaining the situation. I don't talk about it on my Facebook as you never know what work associates or future employers might see social media, even if it is set to private. Personally, I don't consider my transition anyone's business, and I actually don't have many people ask me about it, even those who I have told. Mostly people don't seem to care all that much. I sometimes wonder if people "take It better" when the transition is FTM or if people in general just prefer to avoid talking about stuff they don't know much about. Either way, it's made it fairly easy for me--a few private messages, and I was pretty much done.