Alright grasshoper, I'm gonna post my 200th post for you. She most likely means that before, she was intimidated because she didn't know how to approach/get to know you, there was mistery and the unknown.
"Intimidated" in this context, is woman-ese for, "I was interested but you seemed too hard to get." Kinda like when we have a crush on somebody, so we think of the worst possible things that could happen if we tried to approach, there is a sense of risk
Sounds now that she's getting very comfortable; now I don't know how much time you've been spending with this one, but chances are you are not misterious and not enough a challenge, therefore she's loosing some of that initial interest that came with the initial novelty.
"Harmless"in woman-ese, in this context, means not enough of a challenge, predictable, borderlining "boring." So start throwing some curve balls and re-spark some of that initial interest.