@linda6996,
Hi Linda,
when my daughter was 13 years old ( she's 15 now) she also had a toxic BFF just
like you. As a mother I could see that this is a train wreck waiting to happen, but
my daughter did not see it at the time. In her case it wasn't as much as her BFF
treating her badly, she just encouraged her to do things that would bring them
into trouble in school.
It took a while for my daughter to realize that she'll have more trouble than
benefits if she continues being friends with that girl. One day it clicked and
Jane (my daughter) learned that the other girl was jealous of her and deliberately tried to cause her ill will and get her into trouble. Jane actually felt sorry for the girl, she had no anger towards her, but the spell was gone and their friendship was over - thank goodness!
Perhaps you can sit down and try to analyze your best friends behavior
and ask yourself why she's doing this. If you cannot come up with an answer
yourself (although I am sure you will), go and ask her! Chances are that
she is jealous of you and has very little self esteem herself.