Your problem is that you dreamed that your boyfriend turned black. What was the situation then?
Personally, I think that according to some basic rules and regulations of Duke Zhou, then you can dream that your boyfriend's face is black, so in fact he has something suggestive in it. He hinted that your boyfriend is in good health and his face is particularly white and tender, which is why this happens in dreams, so dreams are often the opposite.
So in this case, you don't have to worry, it should be that your boyfriend is healthy and beautiful.
These are personal answers to your questions. I hope I can help you and you can adopt it.
The best people wish you health, happiness, good luck and all the best.