Supergirl, Season 3

Supergirl:
I just don't want one mistake to ruin our friendship, that's all.

Lena:
It won't.

Supergirl:
Good.

Lena:
We don't have a friendship, Supergirl. All this time we've been working together, it's been about work. We have a mission to complete, and I am not about to let any tension between you and I get in the way of that. Are you?

Supergirl:
Of course not. I... I just hope, um... when we solve this, we can work to rebuild our trust.

Lena:
Why is it so important to you that we're friends? I have friends, Supergirl. Friends that don't scheme behind my back or lie. Given my family history, they know how painful that would be. They also know I would never enter into a friendship with someone who's already breached that trust.

Supergirl:
Understood.