One of the most interesting bombshells to emanate from the Boruto manga was Mitsuki's crush on Boruto. Many assumed the romantic arc would be between Boruto and Sarada. While the property did briefly touch on them and a love triangle with Sumire, it's really made Mitsuki the person who's more heartbroken over not being able to tell Boruto about his feelings and the fact he wants to spark a romance.
Source:https://www.cbr.com/boruto-two-blue-vortex-mitsuki-kawaki-lgbtq-queerbaiting/