Consider reading this article together with your partner. It may become one of the best things that you ever do with each other.
My spiritual director in the seminary, Fr. John Loya used to say that prayer is the most intimate encounter we can have. He would sound out “Intimacy” (In-to-me-see). When we pray we are sharing the deepest part of ourselves with God. When a couple prays together they share the deepest part of themselves with each other and God.