Hey man it's worrying that its making you so upset that you can't be together. I'm in the exact same position right now with someone I like. For me, telling her I liked her and having her say she didn't like me back killed me inside but its hard to love someone when they say that to your face, so it was probably the best way to get over her. Be open with her and tell her how you feel. Ask her if she feels the same. If not, move on. Easier said than done but there's someone out there who will treat you right, not send you mixed signals like this. Good luck my friend