Be patient with them and just try to be supportive in any way you can. Anything you can do to improve their mood is going to help. One of my patients prepared a comfort box that she could open whenever she needed to feel better. In that box she kept a photograph of someone she loved, a piece of soft fabric that she enjoyed rubbing, a lavender essential oil that she enjoyed smelling, and a bar of chocolate. You could something like that for your friend or family member!