My Dad is mid 70s, worked professionally till his late 60s, has always been active into cycling and travelling. Since retiring has gradually become more withdrawn, although does do some voluntary work. He lives alone. He had a period of depression in his teens and in his 40s. He came out of both and was very positive in his 50s and 60s. This time he is not coming out of it, and has now not left the house in a couple of weeks. I have been round to see him and so has another friend. I have suggested things which he agrees to but doesn't do. Not sure what to do next. Thank you