2. According to Freud's explanation of dreams, "it is absurd and wrong to dream that losing one's teeth symbolizes the death of someone in the family. The correct explanation should be a symbol of psychological castration. " I think this explanation is more in line with your present situation, because you have a new pursuit now, and subconsciously want to end your past secret love, so you have such a dream. So, you should cherish everything in front of you! Say goodbye to the past and pursue a better future easily. Good luck!
It is possible that you hit your cheek and put it on that tooth when you were sleeping, and you fell asleep in an uncomfortable dream.