I NEED HELP FAST

apologise and then try stayinng out of her way until it all cools down?

Thats pretty slack on your behalf - she has every right to be mad -put yourself in her shoes you would be too - friends aren't supposed to make jokes out of each other - no wonder shes deeply hurt I would be too. Its really a trust issue hey? can she learn to trust you guys again - until then all you can really do is be sorry for what you have done and hope she forgives you - sorry hun I dont mean to sound harsh or have a go I just think what you done was really cruel - anyways I hope it all works out for you guys and you can manage to get your friendship back on track
With Luv Eirisa