"Uncle, how can you say that? What if the rumours being spoken out there are nothing but the truth? Uncle, don't be with me just because you are afraid of losing me... Death is just part of human life cycle, we can't escape it. Don't get your life cycled around me and forget to genuinely be in love and be happy! I won't forgive myself if it turns out to be a sham!" Yes, her feelings for him didn't matter so long as he wasn't lying to her and faking things. The last thing she needed to do was to drag him along with her life and end up living a hopeless and unhappy life.
This wasn't the reason she was reborn, her Uncle had to live a happy and fulfilling life away from all the problems, even if she wasn't the fated one in his love life he could find his soulmate.
