Met her through a dating service?
That is something I am not famliar with, and would love to hear more stories about how these types of things work.
Anyway.....if you met through a dating service, the type of problem you are experiencing seems unavoidable (or do you get to see a picture first? ).
I wouldn't call you shallow, but if you truely feel like you just want to be friends......tell her now! It's no fun to have your heart broke.....even if it is just a teeny, tiny bit.
Dating services!? Good? Bad? What?