I actually thought fiddling with her hair, its a sign that she's comfortable around you. Like she's comforatble enough to do little girly things around you.
I doubt its a sign of boredom, because if it was, she'd just look very uninterested and out of it.
Btw, this girl was also playing with my hands and reading my palms
Maybe it is a sign of interest?
She was also generally continuing the conversation very well..
Could it be interest, we have dirty danced in the past. But then again alot of girls think dirty dancing is nothing.