The "touch barrier" thing.. what just happened?

The girl I've been talking to and I have started the whole touch barrier thing. I eased into it, I complimented her coat and started playing with the sleeve, and once I noticed she was cool with that I played with her fingers and started swinging her hand around and she was cool with that, all the while we were talking. My question is, do you think I should try holding her hand and seeing her reaction? If she doesn't object it obviously means she likes me.. I think. would any girl just let some guy she didn't like play with her hand for half of the period?
The "touch barrier" thing.. what just happened?
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