Dude, if she doesn't digg you, that's the situation. Instead of jumping all over her trying to make it right, sit back a few days (1~2 days) and think it out.Try to decide if it's worth having someone like her back. Think about what you want from a gf, and if she is really suited for the'job'.Some who simply starts ignoring you is not long term material. In my opinion this kind of thing should mean a fast breakup.However, if it's to hard to break up with her in a second, try to let her be a few days, then talk to her a little, ask her out once a week, then once a month and so on. Try talking to her about your new achievements -like the new girl that you like- and try to transform her into a good friend. She does know you a bit, so she could be a friend.Good luck