Should I tell my bf or not

Tonight me and my boyfriend were talking, and he said that he got into a fight when he was in high school and got suspended.

He asked me if I ever got suspended and I panicked and said “ no”.

But that’s not the truth. The truth is I got suspended for something stupid and embarrassing in high school.

I’ve actually had anxiety that he’s gonna meet someone that I went to school with and talk about me and that they will tell my boyfriend about it.

Idk if I should just tell him or not. I really don’t want to. I just want to leave it in the past. It’s been like 12 years.