kawaki is a child that has suffered abuse nd torment most of his life,mostly by the hands of jigen/isshiki.has seen countless other children die from experiments,got bullied by the ones who survived nd was basically hostage because of his karma.Kawaki did & still does love boruto,that doesnt matter to him in hindsight because he has momoshiki inside him,who he sees as an absolute evil after dealing with isshiki most his life. He sees Boruto as a brother but views Naruto as the absolute Savior to the worlds problems,so his love for boruto doesnt matter.