21 Years old guy + 15 years old girl?

Ok.. so i met her in a party few days ago. She told me that she is 16.. and i was like.. ok cool. Then we met again the next day.. and she said she is 15.. (she will be 16 in 2 months) Ok.. so.. i like her she is realy nice and good looking - but.. i cant have sex whith her for the next.. 2 years =\ (illigal shit...) So.. whay should i do? Oh.. and her perents... thay want to meet me =\ (ehh..)