If there's someone in your life that you feel is slipping into that trap, show them that you care. And I don't mean tell them that you care, show them. When I was in that pit words were utterly meaningless. People say kind things all the time that they don't actually mean. But when my mom showed up to my door at 2 am, worried because I didn't return her texts that day, I felt that. I felt that through the numbness of depression and SSRIs.

Ultimately though, as the other poster said, it was up to me whether I kept going or not. The thing that helped me was going out to get breakfast alone on Saturday morning. Feeling the sun on my skin, watching the birds, and eating a good meal eventually helped me come around. That, and getting away from the situation and people that caused the depression in the first place.