I don't know what in your pattern hit up against the limit -- clearly, the 19 friends you have is nowhere near the maximum. Those are set by Ning, not TBD, to ban the sending of too many invites. Perhaps deleting some of your unanswered invites would allow you to friend people again.
Mrs. Alendar
Jul 21, 2009
Robin Wolaner
Oct 10, 2009
Ladyg
Oct 10, 2009