I agree that he needs to bite the bullet and let her know that he won't be able to go to the prom with her. He should probably be honest with her and tell her that he hasn't really gotten into dating and that you feel that he is too young to be dating just yet.
Yep - I think he should call her and let her know that his folks don't want him going to prom - I always told my boys that they could make me out to be the 'bad guy' if they were in a situation they were uncomfortable with.
I agree that he needs to bite the bullet and let her know that he won't be able to go to the prom with her. He should probably be honest with her and tell her that he hasn't really gotten into dating and that you feel that he is too young to be dating just yet.
Good luck!
p.s. good to see you back.
I'm with Kristie and Pam, let him use you as the bad guy if necessary.