Does anyone hate Yang Mi as much as I do? Tell me why 8~

My classmates always say that the people I like are terrible and always insult them in front of me. This classmate is my good friend since childhood. She likes Yang Mi, so I hate Yang Mi very much. I told her not to say it in front of me even if you hate it, but it didn't work. She also brazenly said, can I not hate Yang Mi, fan behavior and idol paying?