A really shy girl

I need help with a shy girl , i just met her a week ago the first day we started talking she was very participative in conversations,and we even went together to our houses , however , the days after just went really bad ( she gave me one word answers everytime) and to make it worst i think she is mad at me because today i was talking to a friend and i asked him who was the worst student in here because of their grades and he screamed the last name "......" and she turned to face him well.Well this time i REALLY dont know what to do to "game" her.

Provide more information first and foremost as I can hardly understand what you are saying ....

Get her drunk. Every shy girl I've known has opened up after 2-3 drinks.