Developing a crush on someone, or just really liking them, seems very human and normal. Are you asking us for advice on what to do? (It was a bit difficult to read your topic)
You can ask her out. But she met you in this sphere. How do you think that she'll respond? The worse that she could say is thank you but no thank you.
Or something like that.
I'm sure others will chime in on why you should or shouldn't do this or that or offer advice such as I did above.
But only you are going to know what's right for you. It could be that just having her as your "go to" gal would be best in the long run. Relationships with young working girls (very young in your case) are always fraught with dramatics, or so it seems.
So good luck with what you decide to do.
Sincerely,
Elisabeth