She's tired.
She has been for a while now.
Sometimes she forgets things she shouldn't.
Or she thinks too much about death.
But she's just tired.

She's staying inside more often.
She hasn't met her friends for days.
She gets a little sad sometimes.
Maybe she should text them.
But she has a lot of homework.

She can't concentrate.
She tries revising but remembers nothing.
Her grades are getting worse.
She's trying as hard as she can.
But she's just tired.