It's not a sign of anything. She was just pulling down her hair. I don't really support the notion of "magic signs" people give off because people vary so much in what they do, and when they do it. If I like a person, first I find out if they are single. If so, then I ask them on a date. No big deal.
I have a long time interest in psychology, specializing in relationship dynamics for 30 years.
(Please note, we give the best advice we can based on the information given in a post. For better advice, please include the age of all romantic partners.)