Intimacy-seeking stalkers often have delusional disorders involving erotomanic delusions.

I haven’t seen the film, but it sounds like a platonic version of erotomania, or a non-specific delusional disorder.

I remember it being quite good, just that it was the first robin Williams movie I saw that wasn’t a comedy and where he wasn’t a crazy jumpy fun guy, it was jarring for me the first time I saw it.

I would recommend it though, it was a good movie