Obviously, it is not everybody that can get married. There are those people that are not cut out for marriage. Marriage is not an easy thing as most usually take it to be. With marriage comes so many responsibilities and commitment, and many people are afraid of not the responsibility aspect of it but the commitment.
However, as for those that feel they can make the commitment, they can get married. But not the kind of commitment that is not fully instituted because with this, there is bound to be all kinds of threats that might likely render the marriage uninteresting which could lead to divorce. Commitment in the sense one is willing to make sacrifices and compromise if the need be.
Additionally, the couples must be selfless, willing to tolerate and have understanding of each others needs.
But as for those that think they cannot give 100% of everything they have, it is better to remain unmarried than to be in a marriage whereby they are enduring instead of enjoying the marriage.