Met my gf friends. She has a good few guy friends. We met up with one who's a good friend of hers and another guy and girl I noticed that my gf touched the arm of this guy when they were chatting. Kind of alarmed me. She has said she always used to be a flirty type of person but now she's met me she has zero interest. Should I be worried about the arm touch or am i over thinking? She has known him a good few years. Alot longer than I have been with her. We met today for the first time as she introduced me to her friends