Exactly what KontrollerX said. Lose ALL contact with her.
She will realize what she has lost, and will come back. Just make sure that when she does, you do not quickly start to become needy around her. The most important thing to do is to ensure that you are the prize so that the thought of her being able to leave you does not even cross her mind! And when I say cut all contact with her, CUT ALL CONTACT WITH HER. Do not check her out, talk about her to your friends, etc. It's just as if you got dumped and you want to get a girlfriend back, follow those tips! Start talking to more girls, surround yourself around them. (Sure, right now your frame of mind is: "But Axcell, those girls are nothing like this girl! This girl is amazing, smart, funny. Guess what? I don't care. Surround yourself with them, and make sure she knows you are being surrounded by other women. Women are very jealous beings, so use this to your advantage!) In short, you need to have her frame of mine set on: "I lost this guy once already, I need to make sure this works this time.!"
Girls like to know that they worked hard for what they get. You probably became too needy to her, thus, she realized she could leave you, and she did. Let her know that you do NOT want to become friends, she lost that opportunity, and she will run back. It could take days, weeks, and even months, but I am pretty sure that if she had even a bit of feelings for you, she will run back - a woman's guilty mind has that effect. She will be thinking to herself: "What did I do? I made such a mistake, I shouldn't have done what I did." What you just did was make her feel INSECURE about what she did. She will come running back, and than you are able to use your DJ skills to trap her back again.
Re-read my post as well as the very first reply you got in this topic. With those 2 fundamental points, I am pretty sure you will know what to do.
If you have any other questions, feel free to PM me,
Hope I helped.