Well, as to age, I'm 29 and she just turned 30. Old enough to behave better, no?
Regardless, most of you are right that no matter how she meant it, I should just respond gracefully, unfriend her and get on with my life.
I guess I always give in and talk to her because we were such good friends before and I, at some level, want to regain that friendship. Even now when we talk, it's like time hasn't passed and we are "perfect together" as friends. Do you know what I mean? We really compliment each other well... if only she didn't have the selfish side of her.
Anyway, *sigh*. Time to get on with it. Off to FB I go!