In this passage, we read that husbands should love their wives just as Christ loved the church and gave Himself to make her holy. If your husband or your wife is not a Christian, do not give up. Act and do your duty as a Christian because by your act, he or she will change and may also become a believer of Jesus. In our society today, many young couples live together but they are not married. This is not a Christian act because God gave us the command to marry.
Marriage actually means two individuals love each other in heart, in body, in soul and in spirit.
All of these should be in balance. However, in our modern society it is not so, these aspects are not in balance. For example, some focus more on the body, others focus more on the heart etc. Living together before marriage cannot be considered as a marriage relationship. Outside this relationship, any sexual intercourse is an adultery and God hates adultery.