Answer:
a male friend = (chaver) חבר
a female friend = (chaverah) חברה
The above only work with the same genders (a male would call his male friend a chaver, and a female would call her female friend a chaverah.
If a male is refering to a female friend, and not a girlfriend, she would be called yedidah (ידידה)
If a female is refering to a male friend, and not a boyfriend, she would be called yadid (ידיד).