What you’ve described sounds like a loving relationship rather than a practical one. A practical relationship is like when friends agree to get together if they’re still single after X years, or a heterosexual marriage where one party is outwardly homosexual to avoid social stigma, or two people from different countries marrying for a green card. Your relationship ticks none of these boxes.

I’ve been married for 12 years, but my wife and I didn’t decide to get married as a symbol or declaration of our love for one another. It was a way of officialising our relationship in the eyes of the law, and an excuse to have a bit of a party. That’s all it was at the time, and 12 years later that’s how I still view it. Our love for one another hasn’t changed from before we got married. Our relationship is exactly the same now as it would’ve been if we decided marriage wasn’t worth it.

But you know what? She is my best friend. She is my roommate. That is love. Love isn’t about grand gestures, it’s about the pleasure you derive just from being together. It sounds like you still have that, so there’s absolutely nothing to worry about at all. You’re overthinking it and attributing the wrong value to what you have. Don’t fuck it up.