Either party in a relationship always has the power to end it. If someone doesn’t want to be in a relationship with you, there is nothing you can do.
It sounds like this relationship, whether platonic or otherwise, isn’t working for her, but she’s having trouble giving you a definitive sign. Do the both of you a favour, and forget her. You’ll get over her quicker if you just don’t see her at all, and your heart will open to the next person, who may love you in return.