Issues...

So I have anger issues , anxiety and currently have issues understanding what's going on to do with my best mate . Recently I feel as though something different n negative is happening between us, n idk if she knows how blatantly rude she can be. Sometimes she acts like everything is normal on text , n then just disses me the whole day at skl n just talks to our other best mate ( who is not at fault) . N then she always says " oh y r u so quiet , y r u always quiet these days . N everyone questions me about how quiet I am n how shy I am n how I should " come out of my shell " like I feel like most of the time I'm smiling , it's fake , n y us it that in people's eyes , being quiet n shy and s wrong? This makes my anger issues worse n my anxiety get badder. What should I do ?