I get that she liked the character from the book. However, she needs to realize she has also become a character. She needs to interact with them as she would someone from her timeline. She is treating them as a novelty or play thing,; not a human being. She needs to respect social cues and boundaries. They are not free range one dimensional creatures now that she is on the same platform. Just because they were close in the book, wont mean they will be close when she is with them. She brings a different personality and their conversations will be different; forging new paths and relationships. She need to be careful in how she carries herself. In many story-lines, people will feel bad for the childhood friend and want them to get together without realizing that it takes certain situations for a character to realize that they don't just love you as a friend or sibling. Some who realize wait too late, or the other party may not feel the same; and that is okay. Her childhood friend may not have realized his feelings or is afraid she is doing her confession on a whim. He may also be afraid of the change in dynamic may be if they enter a relationship. Not because you are nice means that you are entitled to someone else's heart/ They may have differing criteria that they look for in their partner. The initial male lead, 'black haired character' seem to have a 'complex' character background, which will probably later be explored. It is the opposite in personalities that may have drawn the initial female lead to him. As long as he doesn't have the stereotypical abusive traits as many shoujo main leads, I am fine with his character. Relationships take work and it may be the trials that the two initial main leads went through that made them bond.