Now what you crying for?
She says you ain't gon' settle down, what you lyin' for?
He asks, and he receives. She’s crying because she thinks that he’s lying and leading her on, instead of committing for real.
The second phrase sounds like its “line four”. In this way he is saying that he is lying about line four which is “Funny though I am perfect for you”. The part where he says lyin' also refers to the previous line when he says she works at the zoo, with wordplay, hence lyin/lion.
To help improve the meaning of these lyrics, visit “Sparks Will Fly” by J. Cole (Ft. Jhene Aiko) Lyrics and leave a comment on the lyrics box