Hey, it happens. Pick yourself back up, dust yourself off, and you'll do better next time.
Idea-- what will you do next time if the same thing happens? Not get out of the car? Stare at her with dead eyes and and a bored look on your face? Maybe work with your IC on something you can do to prevent that opportunity from happening again next time. (no need to smile from afar. Just a straight face is fine. What would possibly cause you to smile when looking at her?)
Me (46) H (42) M:14 T:18, D9 & D11 4/19 - 12/19: series of escalating BDs 9/20 - present: R and piecing