I am in a similar situation with DS (nearly 6), and do not know what to do.
He is very anxious about anything different, especially involving other children. Upon meeting up with other children (playdates, etc) he gets very overexcited jumps around and screams, showing off, wanting fir people to look at him and/or laugh. He then quickly burns out within half an hour or so, and hits some stumbling block (e.g. hurts himself, is told off for something, denied something, other child "grasses" on him, friend does not want to play what he wants to play), after which cries and demands to go home or for other child to leave, as he is "too tired" (he sleeps enough, so that should not be an issue, unless mental "tiredness").
Very anxious about going to school in beginning of term. Had to be dragged there. Still anxious on some mornings. Usually copes reasonably well at school, although occasionally lashes out at other if he feels very anxious and trapped (especially in queues during transitional times).
Says he hates school work, although ahead in most subjects and vastly ahead in reading. Hates lunchtimes, as generally does not feel hungry at school, but is pressured to eat something in the busy environment of school dining hall.
Does not want to do any after school activities, as just wants to come home. Gets distressed at tge mention of any classes he might be interested in. Has luckily agreed to do a mini athletics class during lunchtime on thursday (mainly because he is happy he can just leave the lunch hall quickly).
Hates loud noises and babies/small children.
Was relatively late to walk and talk, although was still within the normal spectrum. Did point, etc. Almost incapable of playing alone since being a baby. Could not be left for any length of time without screaming. Now needs me to play with him if he is not on hus tabket or watching tv.
Always denies any wrongdoing, even when caught red handed. Gets very angry at anyone "grassing" on him. A few insidents of him weeing in inappropriate places, e.g. mop bucket.
Dislikes going out. Never wants to go to the park, and moans about walking (we have not got a car), but scared of learning to cycle. Gives up very easily, gets anxious, frustrated, scared, angry.
I veer between thinking that he can't help the way he is and I am trying my best, and thinking he is a spoiled brat and it's all my fault. I feel so confused. To add to tge mix, I suffer from anxiety and depression, as well as an eating disorder (hidden). Both of DS's grandfathers are strongly suspected of having HFA (one admits to it very readily), and DS's younger cousin is suspected to be on the spectrum, as well (at the age of 3.5 has very few (unclear) words, flaps, hates change, prone to physical violence, content to sometimes line up cars on his own for hours at a time).