Hi there! I wish you really well in your move to college. My first piece of advice is not to allow diapers to get in the way of enjoying and discovering all the great stuff in college - new friends, new activities, rigorous and hopefully fulfilling studies, etc. Don't let diapers make you a hermit, and if you think they will it's better to give them a break.
I had roommates all throughout my 4 years of undergrad, and they were all very cool about it. Of course, after my freshman year, I was able to choose my roommates. I simply told them I needed to wear diapers. It was a true statement, and I never elaborated beyond that. I'm pretty sure they all thought it was purely physical need, which is one component, and need for you is still need, even if you're not physically incontinent.
With that said, I was very careful to honor and respect my roommates in many ways. I'm sure they knew I was diapered most of the time, but I made sure never to change diapers in the dorm room with them present. I always carried a couple clean ones in my backpack, and I looked for some less-used public restrooms on campus and changed often in those restrooms. I also got to figure out the rhythm of my floormates' schedules and when the restrooms on the dorm floor would be busy and when they would be empty for changing. Also, I got to know my roommates' schedules and when I would have the dorm room free for changing.
In the dorm room, I also discreetly stored my diapers - in my suitcase, above ceiling tiles, etc. It's all about respect and care, and if you treat it like it's no big deal, then your roommate likely won't care or mind. People in college are far too busy dealing with their own stuff to worry about what underwear you have on.
The most important thing is to not let diapers rule your life. Don't let them make you miss out on the joys of college life and the fun of having a roommate. Wear them as you need to but go on, go out, and have fun! It's not an either-or situation but a both-and, with a little planning, forethought, and respect you CAN make it work.