I really dont know what to do about her...?

Ok so my bestfriend (or ex bestfriend, maybe) has been acting weird lately. Lke whenever we fight we just end uo making up and laughing lke 2 minutes later. But whevner we fight now we just lke dont talk to each other. And whenevr i try to hang out with her she just ignores me. We kinda havee lke this love hate relationship, but now its lke we both hate each other. And lke she went over and hugged my friend kalan then chyiane and then she just skipped over me and hugged katie. And soo this hole thing just leads to me calling her ***** and telling her that everyone hates her. Oh and lke 2 weeks ago i sleptover at her house and we prank called this boy (now my bf) i liked and stole his number (and shes nvr even met him!) And was lke txted him...and then she all txted me and was lke "ur friend is soooo cool" And i was lke "wow desperate much?" And then i txted the boyy and was lke "u lke her? Shes a really big ***** and shes fat and cant sing" and he was lke "NO! babe really and i was just talking, i dont even know her!" and that was when we got together :) And now im a loner that nobody lkes :( So what should i do about her cause i haveee realy thought of killing her ( I hate her sooo much shes such a *****) And phoebe if ur reading this **** U!!!!