Sorry but both of my kids are ASD, but the youngest barely noticeably as he has really engaged with therapy and workshops, so he functions quite ‘normally’, with some extra time in exams and small exam rooms. Ie the average person wouldn’t know. His older sister has significant MH issues and so DS has, effectively, been a sibling carer for much of the past 6 years. This has significantly added to his stress and anxiety. As a result, we supported his applying to a state 6th form with boarding facilities on account of his needing to separate from her, have space to find friends, and learn to live independently with his own ASD.
It is utterly appalling to think of having a child simply to provide a sibling carer, as we will do everything in our power to ensure our older child is in the best place she can be emotionally/psychologically so that she can live independently. We are saving and financially planning so that there will be money to help this/her.
Lastly, as you can tell from mine and no doubt other people’s replies… if you have one ASD child, there is an increased chance of having another. So you could be leaving two ASD people without support, not one. And the second child could have more life delimiting presentations.
Your best bet is to get involved with the NAS and local autism support groups and help your child adapt and develop skills, and build up a social/support network for both yourselves and your DS. If he has no SEN needs, then there is every chance he can live independently in adulthood. Both mine are planning on going to university and having careers, albeit we are trying to ensure they live at home or in a family owned flat/house. There is huge support for bright students (weekly pastoral care sessions, weekly 1-2-1s with an academic tutor to monitor timetables/coursework etc) and the Disabled Students Allowance to cover costs like a nurse/carer/home help to check in with him during term-time - all scaffolding him into independence.
The behaviours you describe are not untypical of an average 7 year old, just amplified. With the right behavioural therapy/autism support/(dare I say) parenting, he will become more streetwise and self-aware as he matures.
The NAS will had advisors you can discuss your fears over the future with, as well. You’re not alone in this, and neither is your DS.