I've devised a crude, fairly-accurate, and rudimentary method for people to determine who their closest friends are, in case you might have had a doubt. I've found, that at least in my case, this method proves almost 95% accurate:

Examine your Friendster list. If the amount of friends that you share with another person exceeds 20, he/she must be one of your closest friends. I find that this rule remains even with those people who have less than 50 people on their friends list. If he/she is truly one of your lifelong friends, then over 20 of his/her 50 friends will also be yours. [The corollary does not always prove correct.]

If a person on your Friendster is white, you share less than 10 friends in common with him/her.

Those "friends" with which you share zero friends in common - there are only a few possible cases:
1) this person is of the opposite sex, and he/she is a "skeleton in the closet," as it were.
2) this person lives in a different city from where you currently or formerly reside.
3) you have actually not had more than 10 total conversations with this person.
4) this person is a "friendster whore" - one who ups the count on his/her "friends" list for the sake of doing so. (and you couldn't say no)
5) on second thought, who the fuck is this person anyway and how did he/she get on my list?

Examine your list. Contact me if I'm wrong. Sometimes, the truth is that mathematical. Obviously there will be exceptions, but contact me if under 80% of your list does not meet these criteria.