[Tink]

Janet, when he's an adult and his boss tells him to do something he really doesn't want to do he will think back to today. He will do what's asked of him, and his job will be secure because he didn't stomp off refusing to comply. The most important lessons we teach aren't always the fun ones. But that sure doesn't make you a bad mom for doing your job.

When he gets home I'd be sure to tell him how proud you are that he was grown up enough to do what needed to be done. I'd keep my guilty feeling to myself though... no one else but a Mom would feel guilty for expecting him to have gone.
You're doing him a favor by teaching that early.

I think you deserve a pat on the back. He has friends... he needs you to be his Mom and you're doing a great job of it.