Life in the Charm World is much like life in our world, only smaller. As an example, here is Bi-Polar Candy Corn.
When Candy is off her meds, she finds herself feeling sad and without motivation a lot of the time. This can make her grumpy.
She hangs out, but usually keeps to herself.
When Candy is on her meds, she finds that the highs are not as high. Her mood is even, but she misses the peaks and valleys.
In case you thought it was an easy life, Candy assures you that it's not.
She needs to see someone. If you can provide therapy and a god listening ear, it might help her.