We only have to look at the alarming divorce rate in the West to understand this point.
In most cases, romance and love die out very quickly when couple find themselves with the real world.
This was not there in North America before the Second World War.
The women used to wear long chaste dresses and their dating did not involve the close intimacy that we see today.
(Lawful to you in marriage) are chaste women from the believers and chaste women from those who were given the Scripture (Jews and Christians) before your time, when you have given their due mahr (bridal money given by the husband to the wife at the time of marriage), desiring chastity (i.e., taking them in legal wedlock), not committing illegal sexual intercourse, nor taking them as girlfriends.
And whosoever disbelieves in the Oneness of Allaah and in all the other Articles of Faith, the fruitless is his work, and in the Hereafter he will be among the losers.” [al-Maa’idah 5:5] Ibn Katheer (may Allaah have mercy on him) said: “Muhsineen ghayr musaafiheen wa laa muttakhidhi akhdaan (‘desiring chastity (i.e., taking them in legal wedlock), not committing illegal sexual intercourse, nor taking them as girlfriends’).
It should be taken as seriously as any other major decision in life--with prayer, careful investigation and family involvement.
I feel that because we have been in this relationship which is abhorred by Allah, he will never marry me because he has lost respect for me. Allaah has also forbidden this, meaning marrying her so long as she is in that situation…’” Allaah says (interpretation of the meaning): “Made lawful to you this day are al-tayyibaat [all kinds of halaal (lawful) foods…].
The food of the People of the Scripture (Jews and Christians) is lawful to you and yours is lawful to them.
The unrealistic expectation that young people have is what often contributes to the failure of their relationship.
After being "involved" with a person for a time, and then breakiing up and going through the feelings of remorse or loneliness and unhappiness, and then moving on to the next "relationship" and then another break-up, hard feelings, sadness and then yet another series of dating, hanging out, breaking up and so on." prior to marriage, falling in love, arguing, breaking up and then going through the sad feelings and repeating this over and over, are much more likely to end up in a very rough marriage and very possible divorce.