It is never illegal to date somebody, but it may be illegal to get married in some places. So no, it is not illegal for a 14 year old to date a 15 year old.
no not at all
Its not illegal to date, go out and the like but to engage in sex, yes, that is illegal...
No, it is not illegal.
No it is not illegal.
If you have to ask... yes
No, it is not illegal for a 15 year old boy to date an 18 year old girl in the state of Illinois. However, it is technically illegal for them to have any sexual contact.
To 'date,' no. To have sex, yes.