ENFJs, how do you handle life (and yourself) when your person is in a state of emotional/psychological distress?

For example, perhaps your partner is dealing with depression and/or anxiety. They love you very much but they just cannot "be themselves" at the moment because their depression is so crippling. How do would you handle this situation? How does it affect you personally? How do you care for yourself too? I'm sure you get exhausted from caring for your person, so I wonder how you also care for yourself.