You are Killua's cousin and you have been friends since childhood, but he moved away from you because he started to have feelings for you and he did not agree with that because he is from the Zodylck family and the Zodylcks are not supposed to have feelings and Killua decided to keep his relationship with you superficial. Sometimes, you forcefully look at each other , He don't talks to you anymore

When his brother Illumi returned him to the palace from the hunter exam, you went to Killua's room to invite him to dinner because his mother asked you to do so and she knew that he would not refuse your request, but he was cold with you,He basically loved you, but he did not show it to you,When you entered his room, you found him in front of the window, staring outside with his hand on his chin, and he did not turn to see you. and he don't say anything about dinner and he didn't even look at you , You left his room. You thought he wasn't looking at you, but he saw you from the reflection in the window. When you left the room, he smiled because he basically loved you and missed you.