All I can do is laugh and wonder why guys are so damn stupid. If you're gonna do stuff like that, you have to be a little smarter about it. As far as i'm concerned, you get what you deserved! lol.
You spill her guts to her making her feel she's the one for you until eventually she decides to give it a shot, when initally she thought of you only as a friend and then you go and do that. If you get her to forgive you I'll give you your credit, but sorry to say, I don't think you can do or say anything to change her mind. I could be wrong about that but I know what i'd do if it were me and you'd be done. I personally wouldn't go out of my way to talk to you and wouldn't care if ever saw or heard from you again. The worst thing you can do is break someones trust. She may never trust you again.