Do auspicious visions come true after they are interpreted and a friend is told about them? And must every interpretation of a vision come true?

The matter of visions is significant, and only someone knowledgeable in their interpretation can explain them. A good vision is one of the glad tidings. If a person sees a good vision, they should praise Allah and increase in their obedience. The questioner has done well in sharing it with her friend. As for the fulfillment of visions, there is no way to definitively determine it because it is part of the knowledge of the unseen. However, a believer's vision will predominantly be truthful if the time draws near.