I was sitting in the floor in front of my best friend and he asked how to braid my hair. I was about to explain but the guy I like took my hair out of his hands and braided it to teach him how. I was baffled. And he looked around at me and said he thought he did a pretty good job
I think that is definitely a potential sign! Guys wouldn't really get to touchy with a friend unless they really liked you! Also, the fact that he just kind of barged in your conversation definitely tells me he is interested in you!