Sorry. Try getting him involved with some golf/bowling/billiard/ leagues, new friends may lessen his need to call you. Or maybe have him move into an assisted living situation that has daily functions and trips to keep him busy. Or find him a lady friend.

I'm dealing with other parent issues. Been on the phone with my mother twice this morning already.......but I called her both times. She's 74, lives alone, and we are moving her into an assisted living situation in 2 weeks. Early dementia and physically a wreck. Went over last weekend(she's in eastern Washington) and started the moving process........getting rid of junk, sorting things for garage sale, etc. Hypocondriac, needs to see her doctor at least 3 times a week to get pills, gotta have those pills. Sad situation.

My father lives in Bend, OR and is 73 and golfs 18 holes a day and proclaims he'll live forever. He was in Seattle for the weekend and never saw me or my brother and sister or his 6 grandchildren. Too busy golfing with friends. Another sad situation.
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Bless our troops.