here are some signs talking with girls about sensetive subjects because you trust them. much smiling and funny subjects. and like you said touchy.all that you said tell that he likes you but playing with your hair is a big plus .I think he is really into you just flirt back and find out
Does he repect you as a person, do you have rapport, trust, open communication, does he confide in you these as some of the things you need to establish metal attraction if their is little or no mental attraction it is a pysical attraction and he is interested in hooking up with you or friends with benefits arrangement that can lead to a relatoinship if mental attraction increases.
He could be into you or just playing with your head to get in your pants sometimes guys see how high your guard is or how low it is. Not everything we do is intentional, but just wait it out and see if he is into you or the obvious other option.