It's a bit pathetic to delete her after making all that fuss, in the nicest way possible. Why did you want her to add you again? In fairness, it sounds like whether or not you have her on facebook, you're not going to be happy. Ignore her, hide her posts from your news feed (you can do that) and try to get into the habit of stopping yourself before you view her profile.
Are you ever going to be friends with her? Because to me it doesn't seem like you are, so if you've got her on facebook, is there really any point?