It's really easy for people to just tell us "do your special interest, you'll feel better" without concern for whether we even have a special interest (I don't... there are others who don't) or whether there is a deeper problem that does actually need to be addressed, as in your case.
You need to let her know in no uncertain terms that you have problems and they need to be handled, not avoided by sinking into a special interest. If she's bored, that's too bad; it's her job to help you with this.
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Yes, I have autism. No, it isn't "part of me". Yes, I hate my autism. No, I don't hate myself.