The normal age of consent is 16.
If your partner is in a position of authority (teacher, coach, instructor, administrator, professor etc.) and 21 or older, the age of consent is 18 unless you are married.
Sexual intercourse, anal intercourse, cunnilingus or fellatio committed by a person 18 years of age or older with a person under the age of 16 years; or any other sexual penetration committed by a person 18 years of age or older with a person under the age of 16 years with the intent of arousing, appealing to, or gratifying the lust or passions or sexual desires of either of the persons is classified as 'statutory sexual seduction'.
The punishment for statutory sexual seduction (a gross misdismeonor) is:
Up to 1 year in prison
Up to $2,000 in fines
Possible registration as a sex offender if the judge so choose
There are no laws taking into consideration the age difference of partners (close-in-age laws).