Maybe I'm just too old to understand, but this seems a little creepy to me. My friend hasn't introduced me to their friend, but I'm going to start chatting to t

Maybe I'm just too old to understand, but this seems a little creepy to me. My friend hasn't introduced me to their friend, but I'm going to start chatting to them on FB? How would my friend feel about this? If someone else contacted me this way, I think I might be a little reluctant to say very much. I don't know if this is because I'm older, or very introverted, or both.