Of course it is, it's called molestation and sexual abuse.
There are no laws about dating. Not a good idea, because there is only one thing an 18 year old is looking for and that would be illegal.
Only if your parents say so.
Yes, it is illegal for a thirteen year old boy to date a nineteen year old girl. In most places, there are laws that prohibit sexual relationships between individuals with a significant age difference, especially when one party is a minor. It's important to prioritize the safety and well-being of minors in such situations.
Eighteen.
Dating is O.K. but sex is illegal. She's a minor.
There are no laws about dating. It is possible but unlikely that it would be illegal for them to have sexual contact, but that will be determined based on the laws of the jurisdiction in question.
who knows but if it is not go for him
It's not illegal to date somebody no matter what the age difference is. However it is illegal to have underage sex and her parents might not be so happy about the five year age difference (especially since she is only thirteen). So basically; it's not illegal but not advisable either.
Yes
No, it would not be right, and legally it would be considered a rape.
anywhere?
yes it is.