Name of movie where kids fall in love and boy kills himself in end?

ok i saw a movie a long time ago that i can only really remember the end of. these two country kids fall in love and one night at the fair the boy has with this other guy and he tells the girl and she tryed to make him fell better by letting him have with her (which he doesnt), and it eats at him to the point he kills himself in the end and the girl runs away from home because rumor started he had got her pregnant and killed himself for it, and was thought of a good man... the only line i can remember was her sister saying "i kno you, you aint got no baby in you" and she says "who know maybe somewhere out there i can have his baby".... sooo does anyone know the name of this movie?