Mixed signals

Just say "Hey, look, you wanna go out for coffee?"

PLEASE do not do what so many males do and ask DO YOU LIKE COFFEE. That shit will drive a woman away. Treat the term "go out for coffee" as "go out and get something together", not specifically coffee. However, you can ask if she knows any coffee places around where she is, and then gauge how much she likes that particular idea.

However, it does sound like this girl is only keeping you as emotional carpet. She sees you more as friend material than anything more - or shes just super fuckin mousey about how she goes about things.

Jam it back in, in the dark.