A good friend of mine has a history of depression, they sometimes talk about it, but I don't like to press the subject unless they open up to it. This friend never invites our close circle round to theirs, which I've always found a little strange, but I guess hosting isn't for everyone. A mutual friend went to her house recently and told me that they were really shocked at how dirty it was - it's a fairly new house and our friend lives there her DP. They do not have children, and DP works from home. I also learnt that she quit a new job a few weeks ago, with nothing to go to which is completely out of character. I'm very concerned about her, but don't know how to approach the subject? I imagine if I turned up with some marigolds and a duster this would be met badly, especially as she doesn't live alone, it would be like a slur on her DP not stepping up. What would you do?