If this girl really likes you, then she won't give a shit that her mother doesn't want you to go out with her. If she breaks up with you over it, she ain't worth it and doesn't have the same feelings you do. Don't listen to these idiots, they're just trying to sound funny. Tell her mother that grades don't mean a thing when it comes to love. If she can't accept that, tell her she's got a looooooong and bumpy road if she breaks up with you because there are a lot of worse guys in your school.

And I find it hard to believe that you have a B- in your class with your spelling. Last time I checked, "rumor" doesn't have an "e" in it...