A champion card, where the Knight has won and returns steadily holding the cup. Someone could be vying for your affections or trying to prove themselves to you. Perhaps they have had approval from their parents or children, or a divorce has been finalized. Maybe there were trust issues and you have gained that persons trust.
It is a message that a relationship has been won, even though there may have been a battle it was worth it. The white horse symbolizes a pure and humble heart and the message sent is genuine and the intentions are honorable. Some battles are worth fighting for and this is one.