Severus doesn't know a word to describe the pain in his gut when his only friend, his only truthful honest caring kind silly beautiful friend is sorted by that cursed Hat into that equally damned Gryffindor house.
All he does know is that the Sorting Hat can't possibly be right- Lily is beyond those dirty, slimy Gryffindors who hoot and holler like beasts as she sits among them.
And, besides, Slytherin matches her eyes. Her green, green eyes…
His stomach is aching, throbbing, and the feast set before them on their long tables (he hates them already, putting him so far away from Lily) holds no appeal. He couldn't keep anything he ate down anyways.
Nothing could compare to this wretchedness.
Its only a few years later, when Potter wraps his wretched grabby paws around her full and curved waist in a clear sign of possession, does Severus realize how much worse it can get.