What is the story of the ballad of chocolate mabbie about?

It's about a young black girl named Mabbie who has a crush on a kid named Willie Boone. She likes to go to school because she can sit next to him, and waits for him at the gates toward the end of the poem and he comes out half and hour after school, wearing an animal fur (lynx), then she's all alone.

I don't really know where the hell he goes or why the lynx thing is important but... *shrugs*

What happens is Willie Boone leaves Mabbie for a light-colored skin girl (That what the lynx is reference to)