I don't favor trying to block her out of your mind.

I would favor reflecting on what happened yesterday, and on what she means to you, why you find her so important, how these thoughts can be useful to you in your life now.

For example: you spoke of how you got good grades to please her. I wonder if you could still have her as a role model and inspiration, if she could help you in that way even now?

What if you wrote these things down, like say in a journal?