It's understandable to be scared to come out. The first step in my opinion is to admit it to yourself that you are bisexual. Usually when people come out their friends are supportive and they don't really laugh at them. Then again I do not really have any experience with this because I haven't come out publicly that I am bisexual, and that I am physically and emotionally attracted to certain personalities, appearances, and actions of both men and women. If people bully you, laugh at you, or hurt you, they are the lesser person and you are the stronger person because they are jealous of you or insecure. You are an amazing person and you should be who you are.

I was scared too, i went through the same thing. I have known i have been bi since i was 9, all of my friends made fun of me, not kidding. Just do what makes you happy. You do what you want to make yourself happy. Some people really dont like people like us, just like some white people hate blacks, and how blacks hate us, lol. But its different because its sexuality not races. Everybody should be able to be themselves and not be judged. But everybody judges. Thats why we just have to be the better people and know that what they say is nothing. All that matters is that you are doing what makes you happy. Message me if you like, i am here if you need :) Everybody needs to be who they really are. :)

First of all, I have no idea your age. I am speaking from the perspective of a 44 yr old man. I know it can be hard and lonely. Remember you are not alone. To me, bisexual just means being attracted to more than one gender. That is a lot of people because it doesn't mean 50:50 attraction. Most don't admit it, even to themselves. So I applaud, your courage in recognizing it yourself.
If there is an LGBT Community Center or similar in your area, you could contact them. See if they can help. LGBT Community Centers can vary in their experience with bisexuals. The one in Washington DC is great. If you are in school, see if your school has an LGBT group or counselor. Some counselors are more Bi friendly than others. Talking to a counselor could really help, but don't be afraid to disagree or get a new one if they don't understand bisexuality.
Hang in there. You are not alone!

Just be YOU. Those who really love you will accept you just as you are. Forget about all the hype about coming out with it. You are under parental authority and attending school. Such is not an ideal time to think about having sex with anybody. You still have some growing to do also. So just learn at school and be peaceful at home. In a few years you will be free to do whatever with whomever you choose. There will be no more parental authority or school to worry about.
Also, remember that all the hype about "coming out" was started by adults. Not by teenagers. So relax and do what has to be done and let yourself blossom into womanhood quietly. This is not a time to add stress on yourself with issues of "coming out". You are possibly under enough stress as is. It is not a time to add uneeded stress to your life. You know what you are. You know you are a great human being with much to offer. Don't ruin that by taking on uneeded stress. You will have a long life ahead of you and plenty out such issues. Just don't do the "coming out" thing to people please others. Do what makes you feel good and gives you peace. :)

Went through the same thing. As others have said be true to yourself!

I went through it all over a year ago and trust my honey, it's not as bad as you think. I spent months ruminating over it and when I finally admitted it I actually laughed at how little it actually mattered!

I say all this but just know you don't have to come out, it's entirely up to you what you want to tell people and the label itself doesn't matter. It's up to you whenever you decide to "come out" and there's a community here that supports you.