Ever ask yourself why?

Did you ever ask yourself why bad things always seem to happen to good people? I ask myself that very question every single day. The biggest question I ask myself is why did my brother have to be the one that serves as the example to teenage drivers everywhere of what can happen when you're a new, inexperienced driver.
It's not fair that a 17 year old boy, in his prime, healthy, and with so much life left in front of him had to suffer such a tragic accident. It's not fair that he now lives life in a wheelchair, unable to walk, talk, and barely communicate with those around him. Everyone keeps telling me that he will heal in time but its been almost 4 years now and my hopes are dwindling that I will ever experience the things that a sister and brother should. I fear I'll never see him play sports again that he loved so much, be able to take him out for that first legal drink, see him graduate college, see him marry, never hold my niece or nephew in my arms, never grow old with him sharing our memories of childhood. It's just not fair...I miss him so much and feel so alone without him.
While I know we didn't have the most loving relationship growing up...in fact, we fought almost ever day with both words and our fists. We were quite mean to eachother but regardless, loved eachother very much....the way only siblings could.
I see my friends with their siblings and I'm jealous. Why can't that be me. I see them smiling and laughing together, having a good time. I hear them say how they haven't spoken in a while and complain about not getting that phone call to say happy birthday or congratulations when something good happens. I'm jealous and sometimes angry because I know that I will never get that phone call, never get a card on my birthday that says "Your brother, Aaron" like he always used to write. I just miss him so much and everyday something happens thats a daily reminder of what I've lost and what I will always feel is missing until the day when he is back home with us...should that day ever actually come.
So again, I ask, why do bad things always seem to happen to good people?