I do not get what happened in the manga ,can someone explain it to me?
So they fell in love, right? But, they didn't know what to call it and the MC wasn't sure if the other girl felt what she felt, especially since she didn't really know what that was.
And then this boy came along with a crush on her, right? And it turned out her "friend" was so jealous she had to steal and shred all his love letters to keep him away from her. And finding out, MC was like "OH! She REALLY CARES!" and knew this was who and what she really wanted.