Addicted to Substitute Love: the Eldest Princess's Substitute Male Favorite

A man often appears in my dreams, dressed in black, kneeling in front of me and calling me Ali. I searched all over the capital, but only found one disloyal fake. If it's not right, then change it. If one doesn't work, then two, if two don't work, then three. In the end, one of them will be right. Later, when I thought I had finally found it, the third prince of Jingguo appeared. Why does he look so similar?