Don't beat yourself up. Working all those hours +depression is more than enough to not keep a tidy house. How well do your friends know you?. Sometimes it's easier cleaning someone else's place than it is your own. What if you spoke to your friends and said 'i'd like to have you over but the place is such a mess cos of work and my depression'. Then suggest that you'd help do a bit of cleaning at their place if they came and helped you. I guess you just need a nudge and someone to motivate you. You could make it a social event. Have a cleaning party haha.