My friend is a sabotaging ass

My bff is so annoying. We have some of the same classes together and its fine, except she's super competitive. Yup that's right. She is COMPETITIVE over SCHOOL. Now this would be fine if she was nornal about it but nope. She sabotages me by giving me the wrong information for class/ what we r learning. When I ask her to explain something to me that I don't understand she gives me that " r u serious, this is so easy" bitchy look. (Of course when she doesn't get something she laughs like it's nbd but nope, not when it's me). She will say we r gonna study together for an upcoming quiz but instead she makes me quiz her then all of a sudden she "has to go" and I don't get help with studying. She brags about her grades (we have had 1 quiz and she's bragging that's she's got like a 100" like chill. She will always ask how I did on the quiz and if I say I got something wrong she's give that smirk like "I'm better than u"

What else sucks is that we r going into the same career. I've known what I'm going to do for as long as a can remember cuz of my mom, she's changed her mind thousands of times and finally picked the same career as me. This would be fine but like I said she strives to show me up. It's so annoying. OH and she asks my mom for recommendations to get jobs and volunteers and shit. Like excuse me wtf? I've told my mom about all this but it's not like my mom can say no to anything cuz it's rude.

I can't deal with her for the rest of the year at this rate. Oh and what sucks even more is that she's in this app bcuz of me (I'm retarded) so now she'll probably see this. Whatever tho I couldnt care less if she sees this.