My son got engaged at 23. It came more or less out of the blue & we had only met his fiancèe a handful of times. We were a bit sceptical as we didn't know her but we did know she'd been engaged before. However, he was obviously head over heels about her so we kept our own counsel. They had a 2 year engagement, during this time we got to know this delightful, hard working, talented young lady who clearly adores our son. They've been married 7 years & have a gorgeous little boy with another on the way. Try not to be quite so judgemental & don't ask for advice if you don't want to hear it ! As regards the ring - if you've told him he can have it , don't go back on that or he may ask why & that may lead to a family rift. Be prepared, as many have said, that the intended may not want something old fashioned/ second hand