Futurekukoyasu storie

Saiki is someone who doesn't pay attention to his feelings. He only cares about others even if he denies it so much. That is until someone brings his walls down but even then... he can't accept his feelings. The world would come to an end. He can't be a lovesick puppy just because one person started to see him as someone who needed protecting. He just can't! To not know what could happen if he did pursue. He was meant to be alone forever. He shouldn't. God him or herself hated him so much to bring him such luck! So why. Why is he hesitating to reject Kuboyasu?