My Dad is diagnosed with vascular dementia and his condition varies very much from day to day, or hour to hour, may be more accurate. His close friend of some 60 years, who has supported him so much over the last 5 years that Dad has struggled with his dementia has sadly just passed away. Dad mentions him regularly, and doesn't realise that he hasn't seen him for a couple of months now. We don't know how to deal with this as Dad does ask after his parents and his siblings, and the first time he asked after Mum I tried to gently tell him that Mum died a long time ago, and he crumbled as though it was the first time he'd been told this. We now deal with these questions in different ways depending on how he is, but often by trying to bring happy memories into the conversation. I appreciate there's no right or wrong way to deal with this, as everyone's different but just wondered how other people had gone about it, as I know he will be very upset. Should we tell him at all, or tell him and accept that we'll have to tell him many times as he will forget.