What to do when she only wants to text?

I met a girl about a month and a half ago, The time I have known her we have only text. She says how interested and attracted she is. But we have never moved past texting. When I have seen her she is all smiles and hugs. We haven't went out, but she is always saying we should. I have called once and left a message. I text her once to see what was up, but no response. I am not understanding this one.