I would be freaking out! What a total BITCH! Who the hell does that, especially to someone you were once best friends with!!! I would just try to steer clear of her, and keep on reminding yourself that it's your wedding day, and regardless of her, you are marrying the man of your dreams. Nothing else matters more than that. She's a miserable person. Don't let her get the best of you. You're way better than that!