Do you need her help in any area? If not then do
what you think fits.
Is she worth your help? Do you foresee you will need her
help in future? Has she a bad character in
nature? Is she doing those things to you to others as
well habitually? If answer is yes to all these questions,
then forget about helping her. Not worth to keep
as friend.
Does she has her good reason of doing what she did to you and
has since turned over a new leaf and is doing her part to gain your
trust in her? In nature, does she has a nice character,
trustable? If yes, then consider with positive attitude
to help her.