She's The One.

He has her on his mind,
Every day and every night.
The only one he can depend on,
To keep him doing right.

She goes to school with him,
Would never leave his side,
She will always be there for him,
In her he can confide.

She helps him with his homework,
Tries to keep him going strong.
Because of her he eats more at lunch,
She keeps him moving on.

Now he's in some trouble,
She's the one to blame.
But there's a little twist,
Her name is Mary Jane.