well waht i will say is that you arent living a lie. You are living a life. You dont have to disclose who you share your bed with to anyone other than those you share your bed with. So how is that a lie? You are who you are. Fact is in 2 years you turn 18 and will be done with school and then something miraculous happens. People stop caring about whos gay whos popular, so on. it all kinda bleeds away into worrying about growing up. So worry about gettting through the two years and then it really wont be a thing unless you choose to make it one.

I'm a lesbian and my parents are very religious. So I decided to wait until after high school to come out as bisexual, mostly to give them some sort of hope that I would end up with a guy, but at the same time letting them know that I'm into women. And as far as not being into the same things as other kids.... have you ever played the board game Life? Notice how it either starts at a career or college. High school doesn't matter. I know it feels like it does and being gay and alone doesn't help, but I can almost guarantee you that there is at least one other gay kid there. Join your school's gender sexuality alliance (GSA). Hell, start a GSA. I'm sure a ton of kids would thank you. (and btw the GSA includes straight people, so you don't even have to come out;)

I am a 15 year old bisexual female and I know how you feel. Deciding when and how to come out is hard but the fact remains that it will happen one way or another! I go to a catholic school so there would be zero school surport at school for me. If you want my advise tell a close friend. I wish you luck and don’t worry xx

It can be very difficult to comes to terms with being gay.
Your concerns about living a lie are perhaps more about that you need to do it for your own well-being it sounds like your not ready or comfortable with coming out yet so maybe hiding your sexuality is the best option for you at the moment.

Most likely your not the only guy that is gay in your year but others could be doing exactly what you are.
You might have already heard of other guys in your school that have been labeled as gay or have behaviors that indicate they could be gay so your not alone.

Does your school have any LGBT support services in place or does the city you live in have any services for LGBT youth?

If your not ready to come out yet maybe finding a support group in your area will help you come to terms with being gay and it also would give you the chance to talk with others that are going through the same thing.

Unfortunately the fear of how friends and family will react if they find out your gay plays a huge roll in how a person acts and what they are comfortable with others knowing.

Your friends like you because of who you are and the person you are and your sexuality shouldn't matter to your true friends and your family will hopefully support you when you decide the time is right to tell them.

You could also check with your school counselor if there are any LGBT services available in your area,
Talking things over with a counselor may help you as well.

You knew you were gay at a young age as most people do and unfortunately maybe felt it was a bad thing.

There is absolutely nothing wrong with being gay and the day will come that you accept your sexuality.
Your still the same wonderful person that your family has always loved and supported and your friends still have a great friend that just happens to be gay.