Sorry for the late reply. I was caught up in something yesterday. I do not know what primary means. Maybe the file just got shifted from one department to the next.
You can convince them by sending proof of ongoing relationship such as e-mails, chat history, text messaging, sending gifts to each other, skype, facebook, etc.
Remember to give precedence to variety over quantity. Don't send a 500-page thick package. For example, send only 2-3 e-mails from each of the last 6-7 months, 2-3 pages of chat history for each month, etc. When did you last visit him? Start with pictures from that visit (10-15 pictures should be enough but include family pictures as well) and don't worry if you have already sent that proof. Send it again, along with proof of ongoing relationship since that last visit. Once you have sent this proof order GCMS notes again and see the reaction from VO.