Maturity isn’t doing the dishes right away, never leaving a pile of papers on the table, or vacuuming the living room once a week.
Maturity is knowing those thing should be done and acknowledging that sometimes it’s ok if you don’t do them right away.
Maturity is knowing that living with someone is about communication and acceptance, adapting and compromising.
Maturity is knowing it’s better to say what’s bothering you than letting it stew for a year until a small comment makes you explode in a nasty, vitriolic rant about how not only is your roommate a burden to live with and clean up after, but they also have no perceivable work ethic, social life, or any personality beyond being bitter all the time.
Maturity is letting someone say all of that to you, pausing, and responding with, “Ok. Can we sit down and talk about this?”