Marriage between ONE HUSBAND and ONE WIFE ...

    A true marriage in my eyes , where there are exchanging of vows and rings to one another is a love that will and should last forever , and in my case the woman or man should love their husband/wife enough to ensure their commitment before God is fulfilled! Why do we wear rings? A ring itself is never ending and that is how God intended for spouses love to be for one another , and even in death should that partner be loved just as they are here with the living spouse! A RING IS NEVER ENDING AND IS ETERNAL!
Following I copied : The unending circle or wedding ring is a symbol of eternity. For Christian couples, the exchanging of the wedding rings is the outward expression of the inward bond, as two hearts unite as one and promise to love each other with fidelity for all eternity. Likewise, the wedding covenant and the husband and wife relationship is a picture of the relationship between Jesus Christ and his bride, the church. Husbands are urged to lay down their lives in sacrificial love and protection. And in the safe and cherished embrace of a loving husband, a wife naturally responds in submission and respect. Just as the marriage relationship, symbolized in the unending circle, is designed to last forever, so too will the believer's relationship with Christ endure for all eternity.

Though God does give us free will to choose to end that eternal promise if a spouse passes or if both agree into divorce, but you must remember that if you remarry due to a husbands/wifes passing you will not have an eternal love in heaven other than Jesus and God himself... LOVE BETWEEN A HUSBAND AND WIFE IS SACRED IN GODS EYES .... Think of it this way if God was here as your husband and you were his wife, and You passed away do you think God would honor the vows he promised you? I know he would! I felt led to share this and to help others to understand how I feel and see this ..
I love my husband and though he isn't physically with me doesnt mean I am lonely or sad , it means he is closer to me now than when he was physically here with us .. Faith is the key to finding true LOVE (eternity with God) !

http://christianity.about.com/od/symbolspictures/ig/Christian-Symbols-Glossary/Christian-Circle.htm