Could someone help me with a problem between a friend and I?

Okay, so I have a friend, and we used to be really close, but last week there was a guy who she really liked that she asked to the Sadie Hawkins Dance. When she was talking to me about it, I made her upset by saying that based on the body language he showed while she asked him, he most likely would say no(okay, I admit that that was a pretty stupid choice of words). It made things worse when he actually did say no, and now she isn't talking to me. I need some way to apologize to her and hopefully get back into the friendship that we used to have, Thanks!