This problem is actually easy to solve. Falling in love at school is normal. The key is how you guide him. I think you can devote yourself to explaining. Find a time and find something you can do with your nephew. While doing it, tell him about your love relationship. Don’t ask him. Just talk about your own affairs, and then talk to him. He said, I won't say anything to you. Everything depends on you. Uncle believes that you can solve it yourself.

Generally, children of this age hope that adults can understand them