The story itself implies this, especially with why hari doesn't see her former fiance as relationship material, while i'm not saying it's a good or bad justification (the person has to choose that), the story itself is what's pushing this implication, at least from the spoilers i read, i can't say if people aren't reading in more than what is implied, but this is what the novel implies, though depending on your interpretation there's probably some implication that eugene had a crush on her in the original timeline if i'm remembering the first chapter right, but by then it was too late.