Help me with this very weird love triangle

It’s gonna be long but please bear with me.
I recently moved to Japan and I’m going to an university here (I’m not a foreigner, just born overseas). I came across twitter, where there’s my university community. There’s this one guy that is starting to catch my feelings. We have the same exact music tastes so we started getting close to each other (still very distant but gradually), commenting tweets and occasionally replying to instagram stories. We even made a music account to tweet about music, because no one can really understand us besides us two. He’s one year ahead, very kind, and his clothes are kind of streetwear looking. He’s probably the kindest person I’ve ever met, very soft-hearted.

But there’s one big problem. There’s a girl, who is also in the twitter community, that is a mad fan of him. You know when people have their favorite idol in one idol group? People here do the same exact thing even in the university. So this girl’s favorite is this one guy, and almost everything she tweets is about her getting shy or excited because he noticed her. And obviously, he knows too. So he does some “fanservice” like replying to her tweets, entering in her Twitter Spaces to see her reaction ect. Their “fan-idol” interactions are very famous in the twitter community.

The problem is, she’s one of my closest friends. And she’s the complete opposite of me. I know that I’m not ugly, I wear mostly black or white and streetwear based, my hair is bleached and people say that I look kind of sassy or scary, my voice is very low. She instead is the classic anime girl with twintails, she acts like a baby, wears pink and dresses, have a high kawaii voice, very very shy. She is not ugly too. The reason why her and the guy can be connected is also because they are in the same university department (but she’s in the same year as me), so they have a lot in common in computer programming ect.

I’m the supporter of all of this. Obviously no one knows that I’m interested in him, and as a friend who often stays with her, I act like a support whenever he appears at the university. So people see us often in three, but obviously my existence doesn’t really matter in there. I’m gradually getting buried by her and he looks at her more because she’s so obvious in her actions.

Yesterday we went out for the first time us three to eat, because he replied to my story where I was looking for someone to dinner with. And he was like I can go, do you want to invite the girl too? So we went. And even there, obviously she fangirls shyly and he laughs about it.

I don’t want her to know that I like him, but I really want to get out from this situation. I wish he looks at me too, as a woman, not as a friend who have the same music tastes or as HER friend who acts like the supporter of her fangirling. What should I do to make him notice me?