Plan get: Talk for a few, somehbow bring up Caius - be like "So ehh who do you like then? o;"
Problems?
too straight forward. you need to be more subtle.
if you're asking her that you might as well ask her out. it's taking a chance, if she likes you it could be the answer to your problem, if not then she will be mad at you OR you will be disappointed. she knows you like her, it's her call now. all you can do is try to be a true man and be confident.