This is the 9th picture in this series.
This one I think, represents most of Snape's life unfortunately. However, it's specific place in the series was chosen because I think one of the times in his life when he felt it most must surely have been during the war, once Dumbledore was no longer there to guide him, and he became the only person carrying the burden of all Dumbledore had entrusted him with.
For the first picture, go here: https://www.furaffinity.net/view/34119100/
For the previous one, go here: https://www.furaffinity.net/view/34207172/
For the next, here: https://www.furaffinity.net/view/34246185/