What should i do about my apt mates problem?

long story short. my apartment mates and i got into a huge fight about who gets the bigger room. i felt as though i should get the bigger room because i have had to live with randoms all four years and one of the girl had chosen her room first for the past two years. i have had a horrible roommate situation last year with the random but dealt with it because the two girls wanted to live together. they treat me like a third wheel all the time and do things together that they don't invite me to..while at the same time they give me a hard time about not being around and for not treating them as a "best friend". so anyways they camped out at someone's house to get to the apt first so they can claim the room..even though i live further away. later they decided it would be only fair if we all did a coin toss for the bigger room. i won and got the bigger room, but now they have second thoughts and want to swap rooms second semester..which really is such a pain. i stood my ground and said that i won the room fair and that swapping rooms would be a pain especially for my roommate who is from out of state and has a lot of things. this is really stupid, but i don't know what to do. i can't sleep because i feel like i've lost two friends..but at the same time i'm not going to let them push me into the smaller room just so that they can enjoy it by themselves.