Feedback on niche community site

MyPersianBuddies is a social community for Iranians worldwide and we've been open for one year now. Our growth increased for a while, but it seems that now we are completely stagnant. We are maintaining our current members and they are spending more and more time daily on the site but we are getting no new visitors these days. What is your impression of our service and how do we get out of this growth rut?? Thanks guys!