This isn't really a writing prompt as much as an emotional exercise. You don't have to write about this at all if you don't want to. Just sit and think about it.
"Think about what" you ask?
Think about what writing means to you. What has it brought to your life? What has it taken away? And is it worth it to you in the end.
I for one write because I have to. I've tried to stop writing, and succeeded for a time, but not for long. I always end up taking pen in hand and starting all over again. It's not just something I do, it's what I am. I am a writer. Whether I am ever again published or not, I AM A WRITER!
And I'm sure most writers feel that way.