I haven't tried the dating sites, but I've had friends who have had really bad experiences resulting from internet dating sites.
My favorite story was from a friend who was matched with a guy who was twice her age (he failed to mention that the kids in his pictures were his grandchildren), and who showed up to the date in a flowered shirt unbuttoned down to his stomach.
Oh that's horrible!
Actually, I know a few couples that have met online. But I also know many singles that have similar stories to yours.
:^)