You'll work it out. You don't have to hang out with your roommates often, and I would argue that it's often better that way.
Just keep the kitchen, bathroom, etc. clean and don't eat their food or drink their beer without asking. Take turns choosing TV or movies to watch. If you're watching cartoons and they're trying to sleep, turn it down or go to a friend's house. Invite them to hang out with your friends, and if they decline, don't sweat it.
Ask about their day, listen if they're upset, and sometimes make a big batch of spaghetti so you can eat together.
You'll be absolutely fine. You have plenty of friends up there, and they share your interests. Who cares if your roommates don't like the same music as you? Again, you don't have to be best friends with your roommates. Just be respectful and polite and everything else will be fine.
Really good advice! pretty close to what i was going to say.
If you try all of that and they still cant accept you for who you are, you should re consider why you are friends with them in the first place. If you are only friends because "you've been friends for so long" thats not a good reason to continue being friends, it sucks but the older you get the more you realize some of your oldest friends are not truly your friends anymore. Not because they are bad people or because you starting fighting, just because people grow up and move on and sometimes the only thing you have left in common is the past. These friends may become aquaintences rather than friends, but you need to be friends with people who embrace you and help you grow as a person, not make you feel like you need to supress what makes you happy. Life is short, fill it with as much happiness as you can. As corny as that sounds its something to live by.
And im not trying to pull out the age thing because i am only 6 years older than you, but your at that age where you are learning that the life you had at home when you lived with your parents and the life you want to make for yourself are two totally different paths, You are going to lose a few old friends and make a ton of new friends, some will stick, some wont, but there is nothing wrong with growing up and moving on. Dont burn any bridges but dont do things that will not make you happy and comfortable. Become who you want to be and do not let ANYONE hold you back.