Depression can also appear as laziness or a withdrawal from connecting with people in real life. The massive hours of online gaming and the lack of motivation to do chores or household tasks both seem to fit that...
How might your response to her be different if you looked at her like someone who was ill and hurting rather than someone who was lazy.
I'll tell you from my experience-- I was fairly high functioning but also felt very stuck and unable to motivate myself. .. and I hated myself so much.
