Or maybe the girl has come on really strong to your friend, and he is simply not interested in her at all, but has no idea how to get her to stop acting interested in your friend.
Or maybe your friend is gay, and he feels nervous around all girls. Some of the most macho guys, turn out to be gay and even their friends don’t realize it. Sometimes even their wives and girlfriends don’t realize it, until it’s too late.
Or maybe this girl doesn’t fit the stereotype for a “good” or “acceptable” girl amongst his peers, even though he is actually attracted to her. Is she too fat, too thin, too (different) ethnic, too white, too exotic, too artistic, too liberal, too religious, too involved with other guys (or girls) too talkative, too shy, too smart, too ignorant (appearing)? Does she wear weird clothes? Have too many tatoos? Have too many piercings? Wear too much makeup, or not enough? Does she not shave her legs or her pits? Has she dated one of his friends (or one of his enemies)? Does she eat with her mouth open? Is she a vegetarian (in a beef eating community)? Does she speak her mind? Does she keep quiet when she should voice and opinion?
Just curious as to what it is about this particular girl that he says he hates. Has he told you?
Or maybe your friend actually has feelings for this girl, but has zero experience with girls in general and therefore he feels nervous and may say that he hates her, because he can’t imagine ever having a real conversation with her.
Or he’s already had some kind of intimate relationship with this girl (that went horribly wrong) and now he’s embarrassed and disgusted and is trying to say that he hates the girl so it looks like she is the bad person in this situation. In this situation, of course he would be nervous, because he wouldn’t want anyone to find out what really happened.
What do you think his true feelings are for this girl? Tha’ts the only way to figure out what is really going on.