At what point in a relationship are two people boyfriend and girlfriend?

Question

I've been talking to this girl, and we agreed to take things slow cuz this would be my first relationship and she has a baby. We've been out once, and talk on the phone every day. We also work at the same store, although not usually at the same time. When do I call her my girlfriend instead of just "that girl."

Answer 1

As soon as anything physical happens.