drupal facebook friends request

I am using drupal 7 and user relationship module

I had already made a friends search same as that of facebook. Now i want us开发者_高级运维ers to send friendship request same as that of facebook request.

plzz help

"User Relationship Elaborations lets users send a message with their relationship request to another user."

I don't know how User Relationship module work. I use Flag Friend, which have user friendship request working well.