Repetitive refresh syndrome
A facebook illness that involves constantly hitting the refresh button on the task bar. Usual symptoms include unusual amounts of joy at notifications, and using the refresh button until notifications appear, with often as little as 5 seconds between refreshes. 
Steve sat and stared at his computer screen.  He had left the girl on which he had a crush a comment, over two hours ago, but she still had not responded.  Steve found himself unable to remove himself from the computer, and unable to wait for her to write back.  He sat, mindlessly refreshing his facebook home page until a notification appeared.  Steve suffers from Repetitive refresh syndrome.