I know it might seem scary or whatever to add people you dont know on facebook just to get more neighbors, i was more sceptical then most and im sooooo happy i did it! I made great friends from all over the world playing this game! If youre worried about them seeing your pictures and such you can always make a friends group called farmtown for example and only let them see what you want them to see on your facebook. (also very useful to have a group like that when sending gifts!)
A great tip is to get some of your other farm town friends to ask their neighbors to add you, but when i started playing i got about 30 neighbors just from the neighbors thread here on the forum, and most of them are still playing. And if you add someone you find out you dont like, you just delete them, problem solved