Remind her be conscious of what she focuses on.

 

To be happy is a choice. There're always happy things and there're always unhappy things. Depending on what's her focus, over time, it becomes a reflex she'll bring into her adulthood.

Love herself and value herself. Don't look for validations in others' reaction. Take responsibility for herself and not expect others to carry for her.

Ask what can I bring to the table and be the source of light and energy.