Help with Grief. Friend lost in Car accident

So last night around 11 pm 12 am one of my close friends died in a car accident. The other two were air lifted by lifestar. I guess what I'm looking for is ideas on how to cope with this? It was just them in the accident no other car. I live in a really really small town so not seeing him will make a big difference. Also, seeing things that remind me of him and places and not hearing his voice around or anything like that. It's just going to be hard. He just graduated high school and I'll be a senior. It just seems too sudden and it's really not sunk it. It just seems like a really awful dream. Really painful. I just need help.