Yes, Nichkhun once said that he would wait for Song Qian for three years.

On October 15, 2019, Nichkhun made a wish during a live broadcast that he could film with Victoria Victoria within three years, and said that he could wait for three years. In addition, Song Qian also posted a message on Weibo, saying that it would only take three years, which was a response to Nichkhun.

Therefore, Nichkhun did say to wait for Song Qian for three years.