So sorry for your loss.
I guess if there's anything we can all learn, it proves that being "socially successful" and "passing" and "beating the autism" isn't necessarily a recipe for "mental health."
I wish things were different.
I'm really, really sorry this happened.

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"Alas, our dried voices when we whisper together are quiet and meaningless, as wind in dry grass, or rats' feet over broken glass in our dry cellar." --TS Eliot, "The Hollow Men"