Oh, no no no no no!
They better not give Sheldon a girl. First of all, I don't like her... and it's not because I'm jealous, it's just that... he needs someone more... human. *grin* Sheldon has learned and grown in his "humanity" over the past few years with Leonard and Penny in his life. He's understanding sarcasm, for instance. You can't pair him up with someone who will do nothing for him. He's already a genius who believes he's the best person on the planet. In terms of intelligence, maybe he is... but in terms of human emotion, he needs someone completely different to become more than he is.
And, Penny, that was just not nice. Get back together with Leonard to cut him off. Don't toy with him. He's fragile and deserves better.
Bring on the new season!