11 year-old won't settle on his own

[Dontknowowt]

My middle child suffers from anxiety and won't settle down to sleep without someone upstairs with him.
Guess I am best to go up with him at 9pm?
It does mean I get literally no time with my OH or to sit down and have a cuppa, but needs must right?

She's 11 months now but only a half-sibling so she's not factored in really.