I know you think this girl is your friend. But there is no way to know what she thinks of you.
You should stop trying to please her and just do your job as well as you can.

She may being trying to stay on a friendly-ish basis with you even though she would really like it if you got fired or quit.
Don't let her make your job miserable, some people are just like that. They think they are awesome and the job they do is always better and will always try and get someone else fired because they are shifting blame.