How to not depression?

Motivation to exercise may be scarce when you're feeling well, let alone when you are depressed, but try to do it anyhow. "The typical things that we all know are important to taking care of ourselves become that much more important 

Explanation:

enhancing your self-esteem,Understand your triggers,Distract yourself,Visualize your best self

tell their parents and make sure she gets from a counselor or therapist. be supportive and be there for her. be a kind and good friend. spend time with her to make her feel like she's not alone. i'm not a professional but i really hope they stays strong.