I’ll most likely be attending a state flagship university(I’m hoping U of Colorado Boulder), and I’m wondering about the way dorms are set up.
Is it common for a guy and girl to be roommates? Is there any kind of like…way to opt out of that? I’m just not sure I’m ready to be living with the opposite sex. 
I believe coed dorms mean that you can be in a room next to members of the opposite sex. I haven’t heard of any school where you’re put in a room with the opposite sex.
Good luck!
Oh thank goodness, I can’t imagine a situation more awkward, especially considering that you probably won’t have a romantic relationship with the first person you meet…
Nor with the second!
Agree with the above. I would add that if you look on the Residential Life section of the school website it usually describes the different dorms and set ups available at the school.
There ARE some schools where you can house with a member of the opposite sex, but you’d have to choose that time of living situation - Gender neutral housing.
I think this is a really good article that goes through every aspect of it. Co ed dorms, co ed bathrooms, etc. However, I don’t think I know of a single college that will forcibly place you with a person of the opposite sex (assuming the sex they identify with is the same as on their account/application). That would be the biggest can of worms ever opened.
There are a lot of colleges that allow you to opt-in to gender-neutral housing - where you can be housed with anyone of any gender - but no college will force you into gender-neutral housing. You can choose to only be placed with someone who identifies with the same gender as you.
Many co-ed colleges also have single-gender floors or single-gender halls that you can opt into, if you like.
Freshmen are housed in the same room as someone of the same gender as they are; for bathrooms, most students tend to freak out at the thought of sharing one with strangers, not whether whoever’s doing their business in a stall next to theirs is male or female. (Parents, on the other hand…)
A Coed dorm means that the people in the room next to yours, or, often, in the corridor opposite yours, may be another gender than yours. A single sex dorm means that all people in the dorm, all floors, are just men or just women. There are also coed dorms which are single sex by floor.