>>65
If you have a means of heading to their home, I would recommend giving them immediate company. Otherwise you might successfully imbue them with the perspective of how insignificant their problems might be compared to worldly issues at hand. If they are feeling particularly isolated and alone, reassure them that you care for them and would be devastated to see them go - for example: If they say "nobody cares about me", the proper response is "I care about you". Sometimes, if you have experienced their sort of trauma, you can empathise with them and thus create a feeling of shared misfortune. This serves to lighten their burden significantly.

I know a lot of very depressed people.