Does anyone have any advice for how to tackle my 14-year-old son's fear of being alone in any room unless someone else is very nearby? The anxiety he feels is very probably part of his autism – in fact we were told when he was diagnosed that the anxiety was the most prominent feature – but nonetheless he's been like this for years and it's now really affecting my (neurotypical) 12-year-old son, as my older son will start arguments with his brother or deliberately annoy him just so he'll stay near to argue back. (He'll also do this in social situations where he doesn't want to be left on his own or feels uncomfortable.)
Going up/downstairs on his own is particularly challenging for him. When he goes upstairs to the loo (no downstairs loo), he bolts back downstairs so quickly it's getting dangerous.
If anyone has to leave my son alone in a room to go up/downstairs, he'll come up with a ruse to follow them – and sometimes this even happens if we're in the next room. If he suspects he's been left, he'll soon call out to see who's near him. If he leaves something important to him in another part of the house, he'll say it suddenly does't matter – even his phone!
I feel like we've seen a lot of people over the years to help my son with his anxiety, including a hypnotherapist, and nothing has really helped him except getting older. However, this problem doesn't seem to be going away. Anyone else experienced this and found ways to overcome it?