"I have spied for you and lied for you, put myself in mortal
danger for you. Everything was supposed to be to keep Lily
Potter’s son safe. Now you tell me you have been raising
him like a pig for slaughter – "
"But this is touching, Severus," said Dumbledore seriously.
"Have you grown to care for the boy, after all?"
"For him?" shouted Snape. "Expecto Patronum!"
From the tip of his wand burst the silver doe. She landed on
the office floor, bounded once across the office, and soared
out of the window. Dumbledore watched her fly away, and as her
silvery glow faded he turned back to Snape, and his eyes
were full of tears.
"After all this time?"
"Always" said Snape.