YOU SAID:

i like my bestfriend but she has a bf but i also like her bf

INTO JAPANESE

私は私の親友が好きですが、彼女には彼氏がいますが、彼女の彼氏も好きです

BACK INTO ENGLISH

i like my best friend but she has a boyfriend but i like her boyfriend too

INTO JAPANESE

私は私の親友が好きですが、彼女にはボーイフレンドがいますが、私は彼女のボーイフレンドも好きです

BACK INTO ENGLISH

i like my best friend but she has a boyfriend but i like her boyfriend too