I am 13 and bisexual and have only told two friends who are both LGBT. I don't know how to tell my family or best friend, who are very religious. What do I do?

You are 13 years old. There is no need for a great big announcement. You're going through puberty. There's definitely a possibility that you will outgrow what you're feeling that you are right now. There's also a possibility that you won't. Your hormones and your emotions are all over the place. It is my suggestion that you relax on your sexuality, go through puberty and simply mature into the person that you're going to be.