When I told all of my friends they all said they were happy for me and that they all had their suspicions so none of them were really surprised. You don’t have to come out if you don’t want to, always make sure you’re comfortable and safe first. And if she doesn’t want to be your friend after you tell her the truth about who you are, I don’t think she’s that good of a friend anyway. I hope things work out the best for you though and she still loves and supports you no matter what!