I didn't have any friends until I joined a bunch of social networking sites. I have a really nice group of close, reliable friends now. Here's the websites I use:

OKCupid
PlentyOfFish
Mingle2 (Previously "JustSayHi")
Anonidate

If you only join one, I suggest OKCupid. I've made most of my friends on there. Most of these claim to be dating sites, but you can just as easily select "Looking for friends only". Good luck.