Snape's crush on Lily Potter was the most heartbreaking thing that I saw. Knowing that someone you love and care for so much, is married to someone else, and then killed in the end of it all trying to defend her family.
This made me cry. Darn you crying Snape, and Harry with his mothers eyes. Snape had a complicated life if you read the books you would understand that he hates Harry through book but in book 7 he was friendly