Already he's "feeling tired" and asking me if I wouldn't much rather he stayed home to save me having to drive out at goodness only knows what hour to pick him up from the club in town where C is having her 18th birthday party.
No, I said, I am more than happy to pick you up and the socialising will do you good.
This, as usual, was him emailing me from a school computer this lunchtime - emails that usually start off with "How're you doing?" and often end up with him asking me to pick him up from school.
But today I'm busy, so I can't.
And, anyway, I've agreed with the Assistant Head that he's really well enough now to tackle full days in school.
"Tell him I say he must", she said at our meeting on Wednesday. "After all, it's a crucial time for the A2 level students. If he misses more school there's a chance he won't get the grades we've predicted. We believe he is capable of getting those grades, but to get them he needs to be in school."
Home is still Ben's 'comfort zone' where he feels he can run and hide.
But I strongly believe it's time for him to get out there and be with his peers, especially with university looming on the horizon.
However I wouldn't be surprised if he chickens out tonight and doesn't go. Or, if he does, he calls me mid evening to ask me to pick him up early.
I do worry that this urge to run home to his 'comfort zone' when under pressure socially may make it harder for him to live away at university next year.
It's difficult to know whether 'tough love' is the right approach or not...