Two people we know who've lived together for a decade announced they are engaged to be married. It'll be in 32 months. This strikes me as a smidge on the long side.
A bit long, but they don't seem to be in a rush anyhow. :) - Heather
We gave people 16 months and many still couldn't figure out how to make it to the wedding. Doubling it up seems fine to me. - Michael W. May
Not super engaged, then. - Eivind