Most Helpful Girl
Most Helpful Guy
WHATEVER you do, don't chase her. i. e DON'T go to her asking for another chance.
The first bad thing I've read in your OP is the fact that you didn't smile back at her.
Her smiling at you meant she doesn't have hard feelings, at the very least. You glaring at her is telling her "Don't look at me!"
You'll have other chances to smile back at her.
DON'T contact her.