You'll be ok. Just focus on school and ignore the haters. Your sexuality is yours and it is what you make it, it's alright to be a closed door as long as you aren't hurting anybody and it's up to you on who you decide let in.
I suggest that you watch the movie "Beautiful Thing" you probably would get inspired by it. If you aren't from England or Australia you might not understand their accents at some points but I'm American and I understood what they said majority of the time.
https://www.youtube.com/watch?v=pJETqDXeNrA