I haven’t had a roommate in six years (since I was 24). It is glorious. If you’re an absolute slob, then I guess there’s some benefit to living with your girlfriend. But if you can maintain some modicum of cleanliness, you will be ever thankful you’re single, live alone and can go to the bathroom with the door open. My refrigerator has a drawer labelled “fresh produce.” That’s where I keep the beer.