He's 72. I'm in my 20s. Ever since finishing work (a lot of his identity was tied up in work), he is, for want of a better phrase, just moping around really and waiting to die I guess 
He's very organised, he volunteers, always up early and presentable, always "doing things", could pass for early 50s...
But he's so bitter and angry! I think he's depressed. He has had counselling and I wonder if some of it is to do with the fact he doesn't have friends in local area? Used to work abroad and has huge amounts of friends across globe but not locally. He has my mum but tires of her and gets moody.
I can't help but feel he has given up Whenever I try to engage him in conversation he is interested for a few minutes but not really focusing or concentrating. It's so sad. He's always been a bit like this (head in two places at once) but I'm sad, we might not have decades and decades of quality time left and I want to treasure it.