Greetings in that Divine and Most Precious Name of Our Lord and Savior Jesus Christ!
We must really put this deep and poetic allusion from the Tradition in a less modern conception of romantic love. Today in our sensuous world people have really began to forget what sincere love from the depth of the heart is in regards to romance. The love of a deep marriage is beyond mere romance, it is a deep moving force from the hearts of those together. The heart moves beyond reason, beyond comprehension, beyond sense, and is very active. In this same form should be our relationship with Jesus Christ. It should be from the feelings of our heart, not our minds. We should feel this love in an almost tangible way, though in truth it should be beyond description. For those who have had a similarly deep love and intimate spiritual connection with a spouse, then it is meant to be a kind of guide for the way in which we should feel out or relationship with Jesus Christ. He is the Bridegroom coming to enrapture us in the thralls of divine love, a pure embrace of love which allows us to live out eternity in reverence and worship. It overpowers the senses and wells up from inside. It allows us to have trust fully in something other than our selfish grip on reality, and it makes us especially vulnerable and receptive to grow and adapt. This imagery and symbolism then is to reflect a kind of physical way which is a common human experience to explain the spirituality our Apostolic Church and its marriage with Jesus Christ.
Further, in the Church Marriage is a Sacrament, a Divine Mystery, which is in the Grace of God. Marriage, like Baptism or Communion is an operative force of the Spirit which brings us into the Divine and interconnects us with God's Will. So if we are married to Christ, then we are in a Sacramental relationship with Him, which is of course also the case with Communion. Our earthly Marriages are sealed with Communion with the Bread and Wine, and in our Marriage to Christ is equally consecrated with these same Offerings. Just then as we in Orthodox are to acknowledge, indeed venerate, our earthly Marriages as Divine institutions that God has placed in our lives towards our Salvation and entering into His Will, so to should we venerate our relationship with our Lord and Savior.