why am i mildly annoyed by my friend

i feel so bad about the fact that my best friend is actually so annoying like it's not even anything that she's done i just genuinely find her so annoying and i dont know why i just dont like being around her for no reason and i feel so bad but i just go quiet whenever she's around because i can't stand talking to her its just the way she is i love her but i actually cant stand her i dont know whats wrong with me what do i do