Jon tells today's Daily Record: "It is not by any means cut and dried for me. Doubts have been raised about my future - but it will not be a rugby or money decision or because of anything anyone has said or done.
"My girlfriend lives in England and that's the major factor but I am talking to Glasgow as well as thinking about other options."
Meanwhile The Times reports that Gordon Bulloch has yet to start any contract talks with Glasgow, fueling speculation that he will move south with London Wasps and Leeds Tykes among the clubs known to have expressed an interest.