What made for tv movie is this?

I thought it had “Never Cried” in the title, but cannot find a thing.

An elderly couple begin raising an autistic boy who never shows emotion and will surely die. No one has hope for the boy. Later on the boy hears Liberace playing on tv and begins to be able to pick out notes and play piano by ear. He can later talk and cry and says “I’m crying, I’m crying”. It was probably from the 70s or 80s.