David Cassidy Reveals He Is Battling Dementia: ‘A Part of Me Always Knew This Was Coming’

David Cassidy is battling dementia.

The 66-year-old actor, widely known for his starring role as Keith Partridge on the 1970s series The Partridge Family, reveals to PEOPLE that he is fighting the memory loss disease.

Cassidy, who watched his grandfather battle the disease and witnessed his mother “disappear” into dementia until she died at age 89, tells PEOPLE of his diagnosis: “I was in denial, but a part of me always knew this was coming.”

Of his mother’s struggles, Cassidy recalls: “In the end, the only way I knew she recognized me is with one single tear that would drop from her eye every time I walked into the room. … I feared I would end up that way.”

Now that he’s come to terms with his condition, Cassidy has made the decision to stop touring as a musician to concentrate on…