Just leave that dumb bitch, she is not even a good friend
I thought she was a really good friend. She never ditched/ignored her friend even after getting a boyfriend. Her friend is just straight. Nothing can be done bout it, unless MC confesses to lay the feels on the table and then we can see where it goes from there.
Imo false hopes are worse than no hope at all. Better for her to tell MC straight up so that MC can start looking for someone else instead of clinging onto her with a broken heart.
Except, the friend has no idea the main character is in love with her. She does not even know Yutaka is gay. Like, if you are a straight person, how often do you suspect your friends of being gay and harbouring romantic feelings for you? Airi is not a mind reader, unless Yutaka confesses, she is completely in the dark about the subject.