The first person my fiance told was me, and this happened in a sort of roundabout way at first as she was still trying to figure out what she was thinking and feeling. After a few months, she gave me permission to talk to one of my close friends, which I needed to do to set up a support network in case of emergency. I chose her because she has been part of the LGBT community for a long time, and she has always been supportive of people, she can keep a secret, and she knows me well enough to recognize when I'm just having an emotional outburst and when I'm actually in need of help dealing with a situation. I haven't needed help so far, but there's no telling what is to come.
We're getting married in December, and we plan to tell our parents and my brother after the wedding for several reasons: first, we wanted to avoid any fallout from ruining the wedding for anyone. It is important to all of our parents, and so we want them to be able to enjoy the moment without emotional stress. Second, we need to tell them close enough to the wedding that they understand that I knew what I was getting myself into from the start. If we tell my mother too far after the wedding, she will feel like I've been trapped into the situation and will have a harder time accepting it. Third, we don't live near any of our parents, and it is important that we tell them this in person, and the wedding will give us that opportunity. It may not go favorably, but they will have the opportunity to ask questions and have emotional outbursts at us, and whatever else they may need to do.