I told my friend I was bulimic..?

Okay, so my friend always goes on about how 'beautiful' I am and I was really down so she sent me this huge essay on facebook mail. It was really sweet and stuff but in order for her to understand how I was feeling I needed to tell her my biggest secret, that only one other person knows, that Im bulimic. Im overweight, and unhappy with my body, and bulimia most certainly has not made me lose weight. Anyway I dont have a deluded view of my body, I know Im overweight, and the bulimia had just gotten out of control. Anyway, she's so skinny, like half the size of me and I really regret telling her. I just sent it as a reply on facebook and she is yet to reply. I mean I love her and everything, and we're really good friends but Im just panicking at the fact I told her my biggest secret. Also, Im the last person on earth anyone would think would have bulimia, but it's gotten to a point now where it's affecting my health. Ahh Im just so worried as to how she will respond. I sent it last night and she still hasnt replied.