Sorry Chfrat, you cannot start a fraternity when you are in high school. In order to start a fraternity you must be attending a college or university. That are NPC and IFC requirements, the only thing you can do in hish school is just have a club for your friends...without the greek lettering. Sorry and good luck to you when you do reach college!!
P.S. I know this because I happen to be a sorority sister and President of The Panhellenic Council at my university.