I was just on Facebook when I noticed I had a friend request. So, I checked it out and saw it was a girl who had lived next door to me when I was little. This is the third time she - I'll call her J - has tried to friend me! The previous times I ignored her requests because she was so mean and cruel to me growing up.

We went to school together from kindergarten to college. Up until junior high, we were friends, but it wasn't the best of friendships. J was manipulative and emotionally...