I've had lots of crushes on shy guys. Problem is, I'm shy too, so I don't say anything -- and end up with the not-shy guys I crush on, because they ask first. Most of my female friends have had crushes on shy guys too, but the same thing usually happens. In younger crowds (I'm guessing the main demographic for these sites) girls who ask out guys can be rejected pretty harshly so its usually not worth the bother even if you aren't shy. In HS, one of my friends had her crush throw food at her from a car window after she wrote him an anonymous (but fairly obvious) note admitting she liked him. This even though they had hung out lots and she considered him at least a friend. It was more than a little discouraging for all of us, especially since his aim was so bad we ALL got covered in it. Ugh.