Smallville, Season 3

Lana:
Emily, you can't just force someone to be your friend. It's something that happens over time when you trust each other.

Emily:
I know what a friend is. A friend is someone who would stand up for you and protect you. A friend is someone who would jump in a river to save you from drowning, even if it meant they had to give up their own life for you. You don't need to tell me what it means to be a friend.

Lana:
Then you know that a friend would never keep me locked up in here.

Emily:
Get used to it. I did.