We have lived next door to this couple for twelve years, they always seemed very insular, no kids, not many visitors and didn't go out apart from to work. Would see them outside to say hello but not much contact otherwise. 2.5 years ago she died of cancer aged about 58. He took early retirement soon after. Anyway I've recently noticed he's never leaving the house, used to see him sweeping the drive/cleaning the car etc but now he's become reclusive almost. I feel like I want to check on him but my husband says I should mind my own business. Having never really been bereaved I'm not sure if he would welcome it? I've been toying with knocking the door or popping a note through asking if he's ok/needs a chat/cuppa? Any thoughts?