Relationships and Mariage

How come the issue of boyfriend and girlfriend among most people is never centered within God, but come marriage nd then suddenly God. How can this be, we find that most couples have no reference for God the creator but when they have to get married then suddenly God and the church. Does not this show that marriage is just a formality then, for God said when the two are joined together they must teach their children his ways. However we do not find this happening in these days. So my hypothesis is that given these facts, i deduce that marriage to some people is just a formality, it like we grew knowing about marriage and hence people also marry. The esense of marriage is lost. I believe marriage was made by God who is the one who joins the two together when they get married. Now how come their relationship is not centered within God, but when they have to get married suddenly the Lord. Its a contradiction i talk of marriage but i do not center my relationship within God (God is not my reference, most of the time is feelings). God have mercy on us for treating his holy decree "Marriage" as a formality. a formality might also imply what we normally do everyday, greeting people, some people greet just for the sake of greeting.