The damage of domestic violence goes far beyond physical abuse. You need to stop trying to save your abusive partner and start trying to save yourself. You deserve better than to be a victim.
The difference between cancer and depression is that cancer attacks the physical self, whereas depression decimates the mind and soul. Sadly, the way society supports people with the ‘invisible illness’ is the opposite to those with the visibly-apparent diagnosis, and is why the suicide rate is expanding at such an alarming rate.