InThisTogether, I totally get where you're coming from. My daughter is very high functioning and many people, especially older folk, think she's the best thing since sliced bread. Even her autism report, which confirms the Aspergers diagnosis, says she is 'delightful' and she is. But, we have many a moment at home. Moments in school are rare (actually the teachers have never had need to speak to me after school). Whenever I've told anyone she was being assessed, I've gotten various replies, e.g. 'Really, it must be VERY mild, as she seems fine to me' or 'Oh, she's fine, all kids are like that now and again', etc. The only people other than my husband and I, who truly know how difficult she can be, are my parents. Believe me, you're only human for feeling like you do.
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"We act as though comfort and luxury were the chief requirements of life, when all we need to make us really happy is something to be enthusiatic about." Charles Kingsley