Still no negative here, don't let your mind take it that way.
I wouldn't use the word happy in the car response either. Maybe more of a "anything I can do to help" response might be better.
Who cares why she was friendly, the silence is broken. Work your plan, the answers will come one way or the other. Don't let limbo or impatience dictate needing answers, unless you just aren't feeling it anymore. Which I can is not it yet, or you wouldn't be worrying WHY she was friendly. Patience my friend, patience, you prob have another year of this before you'll see anything positive. Or sooner, negative, if you push things.
