I had an awesome buddy/travel companion too, she moved over the reef at about the same pace and with the same air consumption. While I was taking pictures she would touch my arm, hand or leg to let me know where she was and sometimes to indicate which way she wanted me to go next as she was a excellent critter finder. Some other divers including wreckwench here at DB tried to mimic that touch but I knew it wasn’t her.
Although she didn’t want me as anything more than a friend she showed signs of jealousy (I heard this from others) when another woman would give me a hug and/or kiss. So when I did find someone that was the end of that freind and divebuddy relationship, I couldn’t risk that jealousy upsetting my marriage!