There arent any laws around being in a non-sexual relationship where one person is under 18 and the other over. The best thing to do is to check with the person youre hoping to date if they are okay with your parents knowing about it. Someone with good intentions should have no problem with your parents being aware.

Is it illegal for an 18 year old to date a 16 year old?

While in many circumstances it is perfectly legal for an adult to have consensual sexual contact or intercourse with a 16-year-old, there are some circumstances where it is not. Most often, it comes down to the nature of the relationship between the two individuals.