Me and Bf have been together 6 years, the "when are you getting married" questions are few and far between on my side but very prevalent on his side. I even told him the script to say when someone asks "We are not getting married, and are going to have an army of gray cats" this was before Chip came along. Now its "we are not getting married, and only going to have pets as children". After that people usually back off.
Personally I don't want kids and either does Bf, I don't usually say that to people since some with kids get offended.