Please help me

So recently I have realised and accepted that I am bisexual. But i don’t know how to handle telling anyone, even my best friends, about it. I’m scared that they will judge me and treat me differently because of it. One of them is homophobic, but in a way where she accepts it but doesn’t agree with it. I just don’t know. I don’t know how to tell my parents either, I know that they support lgtbq+ rights but I don’t know how they would react. It just gets really hard keeping it from everyone.