Don't want to get your hopes down, but this happened recently and I had a friend get so excited she called long distance.
What they're doing in the instance of XPervert is taking the A underground publicly and making new "secret" pages. They even defriended each other and some friends of mine got very excited...well, the same week he told me he got a house with the person, so my gut wasn't wrong.
One thing that was hard at first but really helped me was to not even go to the site anymore. I don't want to be "connected" to things they do or chance spying on me and I feel much better for it. It became a very anxious thing for me and I was constantly looking after them...now I'm free of it, though they are in my mind during times of high stress or lack of sleep.
I hope it's really all done for your sake, but people do all kinds of sneaky things with those SNs. (social networks), I'm sorry to say.
A person is a person, no matter how small. -Dr. Suess
Perserverance and spirit have done wonders in all ages.