I would call it an achievement but a phase that one would surely pass through. Not being married doesn't make you irresponsible or irrelevant. Being successful and impactful in life is what I call an achievement.
Don't go into marriage because you think it would bring you happiness or because you'll have someone to always laugh. Or should I say because you don't want people to look down on you.
RE: {Eng-Esp} Is getting married an achievement?