'she didn't want to work with anyone because she didn't like people.' This is incredibly understandable. For one, group work is a pain in the rear even if your normal, and if you're gifted? You're expected to do the majority of the assignment without help, or at least that's what the rest of your group expects. And if she dosn’t like people it's perfectly okay, it's called being an introvert. And for introverts, people are exausting. It's okay, there is absolutely nothing wrong with her, she just dosn’t like people. And dear god, if you bring her to a party, give her your electronic device so she can find a quiet corner and zone out.
Sorry if this came out as a lecture, it's a really big button for me.