@PeterRS
I could go on and on how much the movie omitted.
Aciman tells us how Elio must be an extremely attractive boy, on the cusp of becoming a man, and how Oliver represented everything a teenage boy like Elio would look up to. Really, everyone liked Oliver. They had a nickname for him, the movie star.
Elio recalled a missed opportunity when he had been in Rome wondering around, how he drew interest from young men that found Elio quite fetching, and how one kept his arm around Elio, not wanting to let go, even after Elio turned him down.
It is no wonder how Oliver fell for Elio and how Elio pined for Oliver.
Even the little girl from next door confronted Elio how she could tell how much Oliver liked him.
Oliver's challenge in the book was how to tell a teenager you love him. He tried twice.
Much of that angst was missing from the movie.
I get it. That's what happens when a screenplay is adapted.
Yet, if the casting had got the ages right, the movie would have worked more than it did.