Fake People

So I’m dealing with a person who is claims to be my bestfriend but is ALWAYS negative. She always has some slick shit to say to me. Always some smart comment. I can’t even be quiet and do what I have to do without her saying something negative and unnecessary. I as a bestfriend am there for my friends. She constantly says I don’t have to but I have to remind her that its not about feeling like I HAVE to, it’s about the fact that I want to cuz she suppose to me my bestfriend, but she’s made it very clear even admitting it to me that she really doesn’t give a fuck about whatever is wrong with me. Whenever I need someone to talk to about something or to vent to someone she constantly says “I really don’t give a fuck” but not to long ago she was otp with me about how she feels insecure around other girls because of her weight and it gets me thinking.....so you expect me to hear you vent to me all about how bad you feel about yourself and how you feel like you don’t fit in with the other girls yet you always say “IM A BAD BITCH. Idgaf what people say about me” well CLEARLY you fucking do. She always tries to walk all over me with her abusive comments but when I defend myself with the same attitude and energy, suddenly, IM the one with an attitude problem and I need to get my life together. She’s always the one to try and explain to everybody how their life is suppose to be but can never stfu and listen when people do the same to her. She’s a hypocritical mess and because she doesn’t give a fuck there is really no point in trying to get through to her cuz all she cares about is herself.😪 I just don’t know wtf to do✌🏾