Need advice on what to do about her?

Don't lie to yourself. She doesn't love you, she likes you and probably she could still spend nice time with you, but as she already told you, she loves her boyfriend and she will always go back to him. Something similar happened to a good friend of mine. A girl told to him and to another guy that she loves both of them and she cannot decide. For about half an year she was either with one, either with the other and poor them were waiting for her to make a decision. Finally she chose the other guy and my friend suffered a lot and for a long time. So, please do not insist. At least she told you soon enough she wants her boyfriend. What I would recommend you is to take a brake and move on. Try to stop any type of contact with her, at least for a while till you recover. I do not know how you are, but for me this works the best and I recover the fastest. Otherwise, who knows what will happen and how she will flirt or so and when you think you are better you fall in love again. Take a long enough break and concentrate on your work/studies and your family and friends. Good luck!