How to tell if a Scorpio girl likes me?

Me and my friend went over to another friend's house for a quick buisness transaction. so my friend goes into the dude's room. its a chill environment, everybody just relaxin, smokin, drinkin.. They cant see me, as im in the hallway. When i see my friend, i shake his hand and then a girl who was chillin there, who i knew because she was in my cl in high school, said "wats up" to me, and not to my friend. Then she kinda started plyin wit her hair, but not fo long. Then we had to leave and she was like "later"...but see, im a Virgo, so we are both quiet people..