I like the bluntness of this. I find it interesting that this is a letter to yourself, yet you are talking to the depression? In my mind, they cannot be the same thing. 'You' does not equal the depression. In the same way as you probably wouldn't get mad at yourself for suffering with a cold, you'd get mad at the virus ;) Hope that makes sense, and that you see that I mean it in a kind way. x

Hope is the greatest attribute that mankind has. I feel your pains but I also see the brilliance of hope in your words. Nicely done!!