Any sex whatsoever or even lewd conduct and the 21 year old is facing child molestation charges. Anyone 21 years of age interested in a 13 year old is a pedophile.

Is it illegal for a 13 to date 22?

Anyone can date anyone, so there is no prohibition against a 23-year-old man dating a 13-year-old girl. However there could be no contact of a sexual nature between the two, or else the man is in danger of being prosecuted for a crime

Is it illegal to date a 14 year old when your 21?

This in and of itself is not illegal, if the 14 year olds parents are agreeable to it. Despite not being illegal, it is inappropriate and creepy. On the other hand, if by dating you mean sex or sexual activity, then it is absolutely illegal.

Is it illegal to date a 13 year old?

It is not illegal for a 18-year-old to have a social relationship with a 13-year-old of the opposite sex, it is statutory rape however if there is any sexual activity between the two parties.