I'm so very sorry for what you're going through. 8 years ago this month my best friend lost his youngest brother, who was killed in an accident almost exactly like what was described in that article. He was just 17 and his friend was only 16. It was a horrible, awful tragedy that affected both their families and hundreds of friends.
His mother has learned to go on with her life, but she still carries her son's memory and the pain of his loss with her every day. Some days she still dwells deeply on it, but she gets by and lives her life as best she can. She still sees signs of him everywhere.
I'm so very saddened that you have to deal with so massive a loss. I do not have words to make you feel better, but I hope that you will turn to the ones you love and will allow them to comfort you and help you through this time. I believe that while you'll never fully "get over" the loss, you will find the ability to go on with your life while keeping your son's memory alive. Know that he would not want you to stop living and enjoying life simply because he is gone. He will watch over you and he will help you get through your days.
My best thoughts are with you.