Every relationship is different, which is why it isn't good to compare yours to someone else's. Some people date for a few months before getting engaged and end up being together for a lifetime. Others wait a few years, but still end up getting a divorce down the road.
One anonymous Reddit user share how his girlfriend gave him a pretty obvious hint that she was kind of hoping to be engaged after they'd been together for years. He posted a pic of a letterboard they share that she'd changed. The pic ended up on the Funny sub, so who knows if it was a joke or not. But that didn't stop users from sharing their two cents in the comments.