My best friend HATES the guy that i REALLY like,,what do i do?

so my best friend USED to be friends with him,but he started bn a jerk to her bc he thinks she annoyinng, and i really like him and he knows. but my best friend hates him and got really mad wen she found out i like him. and she keeps saying i shouldnt like him because hes mean to her and im just confused and i dont want her mad at me but she should want me to be happy,right??