Amy Farrah Fowler, played by Mayim Bialik, is the potential love interest for Sheldon on The Big Bang Theory.  Much like Sheldon, she is incredibly smart and socially awkward.  Also much like Sheldon, she's not very sexual and not really interested in coitus.  Perfect for him really.

Amy Farrah Fowler Quotes

Amy: I have potential for sexual arousal.
Sheldon: A cross we all must bear.

Amy: Sheldon, I am not going through menopause.
Sheldon: Are you sure? You said that with the testy bark of an old bitty.

TBBT Quotes

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.

Howard: Attention people of Earth: Tonight, there will be two moons in the sky.