What is the chance that you help contribute to the depression of those around you?   That you set up goals and a level of inspiration that they can never reach?

That your greatest kindness  only hurts them more?  That stepping into happiness, for you, draws a bigger contrast between your lives, AND that you failing and being miserable isn't any good either. 

Depression is simply a normal and natural response to when we are in a situation that we can not stop playing and are not finding anyway to FEEL success. 

A SEVERE depression is when the person stops, on a biological basis, seeing pleasures and success.   It's when those things just don't find "resonance" in the system of the person.