Who Do I Tell?
Someone who you are close to who you haven't had this conversation with before. For some of you, that's going to be your parents, siblings and closest friends. For others, it could be extended family, neighbors, casual friends or the people you work with. You're looking for people who whether you're out to them or not don't really know how being LGBT affects your life.
You get extra credit for having conversations with people who are undecided or "conflicted" about LGBT issues. Folks in this "unsure" category are the best candidates for increasing our ranks of supporters. But conversations with people who are already supportive are helpful too! A friend who is in favor of equality, but hasn't done anything about it, just might be inspired to get active by your story.
Conversation with "soft" opposition like your aunt, who has nothing against gay people, but firmly believes in restricting marriage to straight couples are good. Even if your story won't change her vote, it might make her think twice before giving money to anti-gay groups. But having these conversations with die-hard homophobes and transphobes usually isn't helpful, and could discourage you from having conversations with other people who might end up on our side.