Family and even a GC who have never experienced depression or has no training to help someone with depression will not understand.
When I had no one to turn to I would call a distress line and just being able to talk to someone over the phone helps and people who work for distress line have some training.
I have also built a network of friends that I have trained to help me sort things out in my head. Sharing your feelings and thoughts... And my friends know to question my thoughts and provide me evidence that my thought process has gone wrong. These techniques are things a therapist can help you with.