I would advise going out of the school environment when seeking a same sex partner unless you are sure one of your friends is gay or bi. Young homophobic men can be very cruel.
Do you have a partner from school in mind already? If you do be careful, some fantasies should stay just that.
HOWEVER...
One of my friends came out when he was still at high school in New Zealand, and the exact opposite was true. He actually gained popularity, although he did mention that there were some taunts, it was nothing serious.
Good Luck Alias