What should i do?

*hugs* I feel for you and your situation. Nothing worse than being alone in your beliefs and lifestyle.

What I recommend you do, is spend some time in touch with PFLAG, which is Parents and Friends of Gays and Lesbians. As you can see by the title, it includes adults, whose children are gay or lesbian or bi, so they will chat to you about how best to approach your folks, whether to talk to your mum first, or closest friends; how to deal with rejection/booted out of home, etc. It also means there's a potential they are able to speak on your behalf to your folks and allay their fears.

Another option is The Trevor Project, whose team handles this type of question all the time. Also, Trevorspace is a great online support forum for LGBT youth, so you might meet someone there.

Don't even think about coming out until you are confident with yourself and your sexuality. You don't need to tell anyone you are gay until you are ready to do so. Being gay does not mean you can't flirt with girls, flirting is fun whoever you do it with. Gain confidence in your own abilities and mix with other students at school. You don't have to tell them you are gay, it isn't their business.

You are always going to be attracted to people who are unavailable to you. This happens to everyone, gay or straight, it's just part of life. You say "No one in my grade is gay". There are other gay guys in your grade but they are just as worried as you are and are staying in the closet. You are not going to discover other gay guys unless you get to know other people. Just take things easy and you will get to meet other gay guys without needing to trumpet it all over the school.

A word of warning. Until you are ready for the world to know, do not tell anyone you are gay even in the strictest confidence. You tell one person, they will tell one more and within 15 minutes the whole school will know thanks to social media. As Sir Humphrey Appleby said "He that would keep a secret must keep it secret that he has a secret to keep."

Try and find someone online who's trustworthy, and make sure they are who thy say they are, or find a friend in real life. Don't come out unless you're a 100% sure that everything will be ok too. Good luck ^^

joyofsatan.org

You definitely need someone to talk to, a friend, teacher, counselor or relative, e.g. The Trevor Project is for LGBTQ teens. It has a toll-free phone line, counselors, and a safe chat site. Call them 24/7 at:
1-866-488-7386.

You aren't alone. Remember that as many as one in 20 of your classmates is gay, too.

Do nothing. Wait until you graduate from high school and go to college, and THEN come out.

Lgbt is not natural