The Gate of Eden: Part One - Mr. Falconer (1980)

The story concerns the relationship between Peter, a 15 year old boy, and Mr Faulkner, an old man whom he befriends. Mr Faulkner used to be a school teacher but had retired after allegations were made about him by a pupil. There was still gossip about him in the town. Mr Faulkner teaches Peter a lot about literature and introduces him to poetry and when Peter returns to school the two of them correspond. The friendship between them is threatened when Peter starts going out with Sue who disapproves of him spending time with the old man.

Unfortunately the movie The Gate of Eden: Part One - Mr. Falconer is not yet available on HBO Max.