This, for me, would have been more than enough to know it was on.

She decided to sit & talk with you for that length of time, forgetting her mate, & you didn't make any further move than hold her hand. God dammit how big of a signal are you looking for?

In my experience, holding hands for anything over 5 minutes with a girl you have just met means she wants more.

You had her in the palm of your hand, literally. You could have took her home, but you missed her.