All girls are geeks. That's why we didn't hang out with them in grade school.
Take it from someone who, like Bossk, passed up a lot of female company because he was too stupid to read the signs: she's interested.
Ask her to have coffee with you. It's that easy.
Don't take advice on what to say. You don't want to craft your speech to make her interested. Be yourself, and if she's not interested, she was never meant to be.
Good luck my son.