The thing that has helped is opening up to a select few of friends. I am not the kind of person to open up emotionally but realized that if I want my kids to have a healthy dad, I have to do something different. But the older kids have noticed my sadness.
My therapist told me something that helped and that is I should strive for progress and not perfection. A goal oriented person is striving for perfection but that's an impossible goal when going through depression.
The fog from depression initially made me believe I had no friends. But when I took time to observe my life and journal, I realized there were a few friends for which I eventually opened up to. It helps to have a support system in addition to any doctors you see.