HELP A GIRL OUT!!! || bff problems :(

:< ive been having problems over the last yr with my best friend n idk what to dooooo. it started off w them suddenly becoming mean to me n we later found out they were jealous i started being more of a friend w our mutual. it started to effect me and we finally sat down n had a talk about it, most of it was me expressing i was upset and them going "idk what to say to that", n from there we started to butt heads. in the past they always came to me ab something i was doing wrong n i didnt really stand up for myself n always apologised n tried to work on it. 

but now its like no matter how i try to address a problem we are having its like if i come to them w the problem im being like brushed off? n i explained thats how it made me feel but was met w another "idk what to say to that". it didnt make me feel good and really got to me when they did something to our mutual friend that i thought was cruel so i lashed out n ill admit i didnt handle the situation the most mature i could of but i wanted to still explain my side n get more perspective on theirs, we "made up" but we no longer really talk :c

since the drifting this year ive come to realise, they havnt treated me the nicest in the past so i began working on standing up for myself but its as if standing up for myself made everything worse?

is it worth keeping contact w them? :( i feel bad ab distancing myself from them bc i keep getting hurt by them and w the time away ive been feeling allot happier.