Originally Posted by tjspiel

No. Don't go get it. Tell him that if he ever get's tired of it that you'd be happy to take it back.
Leave it at that. It's his bike now and he can ride or not ride it as he sees fit, as much as that pains you ;-)

I have an old Peugeot that I bought 20 years ago. I put about 50 miles a week on it but there was a space of several years where I barely rode it all. It spent a couple of years in my brothers garage because my sister in law used it for training for a short time. They finally brought it back because they didn't want it taking up space anymore, - not because I insisted that they return it. I've used it off and on since then but it wasn't until this year that I started putting some serious miles on it.

There's always another bike around the corner, and one that'll fit you better.