Archbishop Fulton Sheen wrote a masterpiece called Three to Get Married. His thesis: 1 + 1 = 2 is wrong. In a Catholic marriage, 1 + 1 + 1 = 1. You + Spouse + God.
The Glue
Human love runs out. We get tired, wrinkly, and annoying. Divine Love (the 3rd Person) is infinite. When your tank is empty, you draw from His. "It takes three to make love, not two: you, you, and God. Without God people only succeed in bringing out the worst in one another."
Read the book. Pray together. MyPrayerTower app.