Should I tell them about my sexuality?

I'm a bisexual girl, but I'm scared to come out what should I do, I'm only 14, and I don't want people to judge me because of my sexuality :( help, this boy at our school came out and told everyone he was bi and he has just been bullied since, and before he was pretty popular. I don't want people to judge me and be nasty to me just because of who I' am and what I like! Please help, all help appreciated :)