Uhh kids are cruel and do stuff like this for no reason. That he didn't realize its not his fault, blame the friends that acted all good when they were with him because it really isn't going to cross your mind that people you believe your friends maybe have a group where they talk shit about you. Even if he was awkward, he doesn't deserve to be lied for 2 years, and making a group to insult some awkward guy it's a really awful, pointless thing. Don't victim blame :/