If a girl lets you pull her hair?

So I've been talking to this girl for a while and I just barely broke the touch barrier because she is kinda shy. Recently we've talking and I like to play with her hair and today we were side to side and I put my hand on her back and just playfully pulled her hair lightly, she didn't say anything or looked at me weird, just like if it was all natural. I know girls usually don't like their hair messed with, especially pulled lol (at least when they are getting to know the guy) is this a good indication?
If a girl lets you pull her hair?
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