There was a girl who liked me, and I kept asking her to admit that she liked me. Finally, with no one else in earshot she said "Fine. I like you." Even if you're not sure if she does, try to get other people to think she likes you (but not necessarily that you like her) however you could do this, then keep asking her if she really does. Even if she doesn't at first she might start to. Well thats my advice.