Ok, so, maybe she's actually in love with him without realizing it, that's what you'd expect from this type of story and such, but... Based on what we've been shown up until this chapter, I feel like Azusa's friend (whatever her name is) has no actual reason to believe that Azusa likes the guy. She clearly stated that she's not aware of him as a romantic interest and that it doesn't bother her who he chooses to date. The friend just kinda arbitrarily decided that she doesn't believe that and keeps pushing the angle that they should date. Maybe she has some secret information that we are not privy to that makes her think Azusa is not to be trusted on this, but that'd be kinda sloppy writing imo. I dunno, it's kinda weird.