I asked my doctor the same thing. I've told my partner...but didn't know if we should have protected sex to protect him.
The doctor (specialist, I should say) assured me that 80% of sexual active people have HPV, but most don't know it.
That is likely why you have CIN I..that's why I have it.
He said there is no cure...however it doesn't affect men, or cause disease for them at all.
So don't worry about it...though you should likely explain it to your partner anyway.