Shelleylou, I am so sorry to hear about your brother.
I do know what it's like, as my brother died in an accident when he was 22 (I was 20). We were very close.
It's a long time ago now, but I still think of him often.
As in your case, anger was foremost among my early feelings (as with your brother, it was someone else who caused the accident - though in his case, that person died as well).
It's not a bad thing to be angry that this has happened - it's bloody natural, and the anger may also help to drive you forward.
I am not a religious person, but I know that my brother is still in my life, in my heart and in my thoughts. Part of what has shaped my life. And he is still connected to all of us who knew and loved him.
So he is still with us.
As your brother will also always be part of your life, your family's lives, and all those whom he knew and whose lives he touched.
Have a drink and a cig (or several of both) if that helps, but most important thing is to be kind to yourself and not beat yourself up over 'what ifs'.
I know it's not very mumsnetty, but xxx