"He seems to have adjusted just fine. He no longer mentions her - I don't think he's forgotten her, but he no longer seems fixated on her. I'll never forget, though, how much she meant to him. I'm really grateful to her for being such a ray of sunshine for him in grade two."

I generally remained fixated for about 6 to 8 years, as I recall.

I subsequently replaced it with another multi-year fixation in middle school, if I recall correctly.