I would be okay with a "not now", as there can be circumstances why marrying right this moment isn't a good idea. But I also don't believe in weddings, while most people do, especially women... So, saying "not know" would mean "I know it will take us 1-2 years to plan a wedding, but I don't want to start a family with you even 1-2 years from today", lol. But I get your point!