I took my partner to my pdocs with me, Pdoc explained there is nothing he can do to make a depressed person happy. I make a real effort to show that I am pleased to see him and I appreciate him. Its hard to make the effort being so low but if I dont he feels sad and I dont want us both to be sad, so I push push push myself through the negative to smile at him, do something sweet for him and try to plan "enjoyable" activities.