Biual at an all girl school! please help!?

so I'm I only came out to my bestfreind and I I'm tired of keepingvit a secret . I feel like I always have to act like I don't like girls and don't luke gaysvbrcaysr everyone at by school that I know foes and I tired off basically living a lie . also I want girls to know I'm avaible . so I just want to come out so people will know. but I go to an ally girl school ! if people found out they would probably freak out and never invite me over and never change around me in gum and stuff. but I don't even find that many girls at my schooll attractive so they shouldnt worry but I know they will. I was planning on doing it anyways because I think it will be liberating and I was going to Start off by just putting it on my mysoace the day after school getts out. should I do it? If not what should I do?