Start a conversation with her. If she likes you, she'll be glad you talked to her and make it easy to talk to her. If she doesn't like you, well, you'll figure it out. But if you want a chance with her, you have to take the chance and speak up. Everyone has to do it sooner or later, or stay alone and get a lot of cats.
First of all Talk to Her! If the conversation goes well make a small move if she lets if go she likes you, but if she takes offense she doesn't. She may look at you a lot or talk a little faster than normal if she does like you to.