the person you are going to marry is called
Engagement An engagement, betrothal, or fiancer is a promise to wed, and also the period of time between a marriage proposal and a marriage. During this period, a couple is said to be betrothed, intended, affianced, engaged to be married, or simply engaged. Future brides and grooms may be called the betrothed, a wife-to-be or husband-to-be, fiancée or fiancé (from the French word of the same form), respectively. The duration of the courtship varies vastly, and is largely dependent on cultural norms or upon the agreement of the parties involved.
Ring finger The ring finger is the finger on which it is the custom in a particular culture for a wedding ring to be placed during a wedding ceremony and on which the wedding ring is subsequently worn to indicate the status of the wearer as a married person. It is commonly the finger between the middle finger and the little finger, and is so named because in some cultures it is the finger on which one usually wears a wedding ring after marriage. In some cultures the wedding ring is worn on the ring finger of the left hand, while in others it is on the right hand. Traditionally, a wedding ring was worn by the bride/wife on the ring finger, but in recent times more men also wear a wedding ring on the ring finger. It is also the custom in some cultures not to wear a ring on the ring finger unless one is married, though an engagement ring is usually also worn on the ring finger.