Besides getting someone else to help pay your rent, there are a few reasons you should consider getting a roommate to be a major life improvement:
Having a roommate will regulate your behaviors and patterns at home. It’s harder to justify sleeping until noon on Saturdays if you have a roommate who is up and moving well before then.
It’s so healthy to be able to come home from work and have a friendly, interested conversation with a friendly, interested person. Conversation with someone you like and trust can help cap off a great day or redeem the nastiness of a bad one.
Living with a roommate forces you to learn communication skills quickly. Unless you want to be a miserable martyr, at some point you’re going to have to ask your roommate to stop a behavior you don’t like. Communicating preferences like these truthfully and effectively is a huge life skill, and your roommate will help you learn that.
There’s a huge psychic benefit to having someone who can watch your back and help you protect your home. Your roommate (if they’re decent) will help you accomplish things – cleaning and improvement projects, etc.
Not all roommates should or will become good friends, but living with someone does present an amazing opportunity for friendship. Here you have someone who can adventure with you and work on goals with you while you both get to know each other personally.