I've always had roommates (both shared room or my own room). But now I live on my own for med school.
When you have great roommates, living with other people can be really fun (some of my roommates in college became my best friends). For example, the girl who I shared my room with was the same major as me, also pre-health, and we had a lot of similar classes/ECs. We had extremely similar personalities, so we always got along and were very considerate of each other. I loved having someone else to vent to about school, life, etc. and we took study breaks together to keep each other sane.
But I've also had some horrible roommates who have no consideration for other people, throw parties in our apartment during finals week, never clean the common areas, etc. And they always seem nice in the beginning, until they're not

. But when it's like that, it sucks to go home having to deal with all the drama.
Since I didn't know anyone as an incoming MS1, I decided to get my own place for once. I really just didn't want to risk getting horrible roommates. I thought that if I met someone during the year, I could move in with roommates for MS2. But I love living on my own too much. I'm an introvert, so I love having the apartment to myself. I'm also an insomniac with a sporadic sleeping schedule, so I don't have to worry about being quiet when I'm up at 3am or trying to nap at 5pm. I love having a clean apartment (I've had some insanely messy roommates), or being able to leave it a little messy when I'm too wrapped up in exams. It does get lonely sometimes, but friends are only a phone call away or live close by. I also sometimes study with a friend.
And now looking back, I'm glad I decided to live alone. I think it would be hard to not compare yourself to your classmates if they lived with you. Like if I saw them studying, I'd feel guilty for not studying. I think if I had to get roommates, I'd consider living with non-medical students.
You could always try living alone your first year. Then if you decide it's too lonely and find people you'd like to move in with, you could do roommates the next year. I know some of my classmates shuffled around after first year.