Midnight's post is mind boggling to me, but I'm going to guess that if you make yourself attractive and make her feel comfortable she will see you in a different light.
That kind of talk is what Millions of Nice Guys do all the time. They dress nice, talk nice, and able to provide all the worldly effects of a boyfriend without the sex.
The truth is however, she may either see you as a friend, uncomfortable being alone with you (if a girl is really interested in you, she'd try to spend as much time with you one on one.) , or other ulterior motives which do not parallel themselves with her "wanting to be your girlfriend."