Not ready

So me and my SO have been together for 14 months. I’ve always heard “when you know, you know” as far as when it’s time to get married and when you’ve found the one. And I love him soooo much. We live together, have for about 6 months. And I think it’s time. We’ve talked about it from time to time and he says he wants to someday, he’s just not ready yet. Which I get. I don’t expect him to be necessarily, not everyone moves at the same pace. But I’m just struggling with not taking it personally and not letting it get to me. Just looking for tips on how to control the urge and prevent myself from being sad or accidentally nagging or pushing him into it unintentionally. I just don’t want to be overbearing or think that it’s my fault when I know it isn’t. Any tips?