My absolute best friends on WP are username88 and MADDuck.
I also have Cultus_Diabolus, Aradford (he hasn't been around in a while though!), Icarus_Falling and syzygyish. I think I was sort of close to others too.
I also have/had lots of PM acquaintances (whom I talked to about 10 times each, some less) in the short time I've been here (I can't BELIEVE how friendly this site is! On an NT site I'd only have like 6 PM acquaintances and 1 or 2 close friends!): gweneven, SteelMaiden, Anubis, time, snake321, ShadesOfMe, greenblue, shadexiii, benj, Malachi_Rothschild, Cervantes, tygereyes, TheMachine1, ahayes, Netish, AnonymousAnonymous, Remnant, dalhousie12, samtoo, Martyboi, and others I don't remember!