I used to be the cool guy but I turned out gay how can I ever live a normal life again?

First of all, let me just say you did the right thing in letting this girl go. And you also did the right thing accepting yourself just as you are. It's the first step, and you've made it bravely. Coming out is a terrible burden to be carried by someone your age, and especially in high school, where it's all about maintaining appearances and where everything is so shallow and superficial. At this stage of your life, you haven't found your true friends yet. Wait for a couple more years to grow up and really know the difference between buddies and friends. I hate it to tell it to you like this, but there's no way of telling everyone about yourself, expecting they'll treat you as they did before. There's a great chance you'll end up alone through high school, and trust me, being on your own in high school is not a very happy thing. If you have someone, a best friend you really, really trust and really, really know, tell him/her, but otherwise I advise you to think twice before shouting it to the whole world. There will come a time in your life when you'll have to come out, but simply not now. And when you'll do, there will be a lot of people who will turn their backs on you, but you'll be better prepared than you are now. And, remember! Those who don't accept you for who you really are, are not your true friends. Best of luck! ;)