TermsB is right.....when I do Freidn Requesting, I have an Excel sheet for this, and track everything.
? Column 1 is the URL of the person's profile
? Column 2 is the date I tried to Friend them
? Column 3 is the results of my Friend Request
This ORGANIC method also allows me to skip over profiles that are useless. For example, if a profile only has like 2 friends, then you know that person isn't using it at all. Hence, a Friend Request to this profile is probably going to sit Pending forever....which probably doesn't help whatever measurement features that Facebook has in place. Also, I go back and cancel pending Friend Requests if they haven't been accepted after 30 days.
For the future, if your Profile building methods are Organic enough, you'll be fine. Too much automation = deleted profiles