It proves a person can be faithful and it is the best wedding present of all. If virginity has been lost, the next best thing is being sorry, and having no more sex till marriage. Engagement is not the same as marriage - it is easily broken. Marriages don't just happen. They are made by unselfish effort.
Marriage is often hard work, and means changing to fit in with the other person.
It means talking, sharing thoughts and problems. Like a garden it grows better, the more the weeds are pulled out and the more loving care is given. It is the ideal setting for bringing up children. No one should rush into marriage. The other's character, interests, behaviour, and family life should be carefully considered first.