Why did you have to say goodbye?

I gaze out the window at the sky,
Thinking of how you're not just some guy.
I watch the sun set, and wonder if you see the same,
I remember that you're so far away, and think that that's just lame.
Although you are my cousin & my aunt is your mother,
I always thought of you as my brother.
You've always been my favorite cousin and friend,
For some reason I thought we'd be like that 'till the end.
But one day you up and told me you were leaving,
By that afternoon my eyes were streaming and my sides were heaving.
I wished and hoped you'd say it was a joke,
But when you left, I realized it was no hoak.
Why do people go away, and leave their family behind?
Was there a certain reason, or were you just out of your mind?
Now I have to make it through today and another,
A giant hole in my gut, awaiting the return of my "brother."
Even though sometimes I think it's silly, all I can do is cry,
For everyday I wish, that you had never had to say goodbye.