What does the fortune teller mean when he says that there is another person in my life?

In principle, since you have asked someone to tell your fortune, you should ask clearly. If it is a general fortune-telling term, people who know fortune-telling can explain it again, but this is the conclusion of judgment. Only he knows best, no one else will know. I'll try to analyze two points for you by experience:

1, which means that you have a dark one besides the object you are openly talking about or your current lover.

2, pure Jianghu words, used to set your words. Basically, you will know that you are not alone, otherwise you would have gone to the self-study hall long ago, and the fortune teller would have "made it clear" to you and wouldn't come here to ask again.