It seems to me that you fell into a crowd that was unhealthy and pretty mean, if not abusive to you. You don't need people like that and if that's all your fb and contacts consisted of back then, then you did the right thing. The best vengeance in life is success. Get yourself together, be independent and take care of your own things. If ever the time comes where you meet one of them, it doesn't matter. They mean nothing.. all they did was treat you badly.