Please Please do NOT see him!!!

First of all everyone is correct, what he wants to do is called statutory rape and it is illegal in all the states in the US.

Over the years I have had more than one young woman (your age) come to me pregnant or with a sexually transmitted disease. For many of them this was a life changing experience and if they had to do it over again they would not. Please learn from others and do not have any more contact with him. Tell your parents or another trusted adult and get away from him...