I would tell her:
That I love her just for being her spacey, disorganized self.
That I love her – imperfections and all.
That she doesn’t have to try to fix everything.
That when she makes a mistake, I’ll help her work through it.
That it’s ok to not feel strong sometimes and when she feels weak I’ll be there to pick her up.
That she doesn’t have to push down her emotions but she can allow herself to feel them in order to process them.
I would tell her how proud I am of her – just the way she is.