A/N: I had an idea for this after reading The Half-Blood Prince. Might be complete with two chapters, might not be...I haven't decided if I'm going to add Harry's thoughts or not. I don't know if I've captured enough of Snape's character in this, he is somewhat hard for me to write. Enjoy!

Disclaimer: All the characters belong to JK Rowling, not to me.

I run. I run away from the only place I have ever been able to, truly, call home. But, strangely, that is not what hurts the most.

It is not the fact that I just killed Albus Dumbledore; that I murdered the only man who ever fully trusted me. I only did it to play my role in the old coot's scheme against the Dark Lord. I can truthfully say that I had no desire to fulfill his wishes, but I did.

The reason that I mark today as the darkest of days is because of the look in Potter's eyes. The look in Lily's eyes.

The agonizing glare of betrayal, hurt, fear, and hatred whisked me back to the last seconds of our friendship in my fifth year. It was those same eyes that bore into my heart and completely shattered it all those years ago. It is those eyes, that look, that will haunt me forever.

I would give anything to make Potter understand. I would give anything to be able to change the look in his eyes, the look in her eyes, so I do not have to relive this moment of utter betrayal twice.

Do I care for him?

Yes, I care for him. I care for him because he is hers. I despise myself because of all the grief I have caused the boy throughout the years. I now realize that he never did anything to me but remind me of his father; I held a child responsible for a crime he did not commit.

That is why I mark today as the darkest of days. Because of the look in Potter's eyes.

Because of the look in Lily's eyes.