Share in activities with the depressed person. Often this individual finds it terrifying to be at home alone. Be ready to do what seems to soothe anxiety and bring some peace. Invite the depressed person also to share in your own activities in order that your patterns of activity are preserved. Above all, patience, patience, patience .
Depression is a disease.
It is marked by a chemical imbalance in the brain. No one ever wants to be depressed. No one can simply throw off a moderate or severe depression. It would be nice if someone could. Being there is the most important thing, being there patiently with gentle understanding.