This is Kawaguchi Hidetoshi. This is my humble answer to the question.
Dogen Zenji of Soto Zen said, in the volume of Gensei Kōban by Shohōgenzō, “To follow the path of Buddhism is to nod oneself.” It has been said.
Also, Daitokokushi of Rinzai Zen said, “The bottom of investigating one's affairs is an old monk and a person who sees each other on a daily basis.” It has been said.
Buddhism is about gaining deep insight into oneself and adjusting one's own mind and actions better and more clearly.
Then, eventually, the purpose is to achieve enlightenment and nirvana, and Shakyamuni has explained various methodologies for this.
I want to walk forward step by step on the path to enlightenment that Shakyamuni walked, relying on the compass and map left by Shakyamuni, with a sense of bodhi in my heart.
After all, otherself (octopus) is otherself, self is self. Whether you have a partner or not, whether you get married or not, I don't think it's necessary to be trapped by that.
I can't say it unequivocally, but as Yoshitake Grammo also said, I think marriage is useful for exposing one's own humanity and getting to know oneself better.
Kawaguchi Hidetoshi Gassho