In chapter 7 Arthur starts to say "you can't" but corrects himself to "is prefer if you didn't" love him respecting Toki's right to do what he wants
He confessed in like the first chapter, the actual words "I love you" and our poor self-doubting girly is still thinking "wow he's just a kinda partner, wow he really cares for me because I'm his sorcerer partner." Sweetheart he's literally obsessed
In chapter 7 Arthur starts to say "you can't" but corrects himself to "is prefer if you didn't" love him respecting Toki's right to do what he wants