First off let me start out with I'm sorry. I am sorry you had to go through what I went through with your first time, because it does royally suck.
It sucks to be used, I get that. He tells you "you're the one." He says that there's something different about you that makes him like you even more. I know the whole story. He only says "I love you" so he can slip his hand down your pants. I can guarantee this is half the guys in your school. They all just want to get laid and get the bragging rights of taking your virginity. I know I know it sucks, but there's really nothing you can do about it. But I can tell you, once you figure it out that he was a mistake and you are so much better off without him.
Now I can go on and tell you how much life sucks after losing your purity and innocence to a guy who wasn't worth your time and I can try and help you heal, but there isn't any words to say for someone who is going through this. Yes it's hard and yes it sucks. But you will make it through it.Throughout the years or however much time you have left of high school it may not seem like it, but each and every day gets a little better, and helps you get to the point where you don't care anymore and you're finally at peace.
On the contrary, he may be a wonderful guy for the public to see, but you know the kind of monster he is, you now know what he is capable of and honestly, I would feel sorry for the next girl he is with, and I would pray and hope to God that he wouldn't do that to her. But you will never know.
Now that you have surpassed everything during the couple of weeks it took you to get over him using you, you are now stronger than ever, you have a brilliant mind and you can go on without him because HE IS NOT WORTH IT. Enjoy your life without him because you will go on to bigger and better things.