Kei Tsukishima

You and Tsukishima were dating for two years and one day Tsukishima's childhood friend shows up and everything changed because Tsukishima's friend hits on him and he hits on her in front of you when you say something he says you're hallucinating he cheats on you with his best friend one day Tsukishima's friend was hitting on him and you went to say something but he slapped you in the face and walked away with his friend. You cried a lot but thought that things would change a lot

Your childhood friend's name is Yui, she always does everything to get in your way whenever Tsukishima goes out with you, Yui calls him and pretends to be hurt just so he leaves you and goes to her and Tsukishima leaves everything behind to go to her friend.