Treat your significant other as prize. Isn’t that how YOU want to be treated?
Don’t ‘let yourself go’ (appearance) and don’t ‘slack off’ (stop being romantic).
Think of your relationship as something of great value. Remember when you were single? You worked so hard to present yourself as humble, patient and generous. Do you act that way now? Or do you think of yourself as the prize? Humility is attractive, arrogance gets old very fast.
God wants us to win at relationship. He cares about how we treat one another. He is a God of healthy relationship.