Hates being the Mediator

I don't think I've ever been so put in the middle before... My roommate and our suite-mate are not getting along whatsoever right now; and that just sucks so much :( I don't know what to do, and what really makes it sucky is that I am friends with both. More my roommate then my suite-mate; but I don't have a problem with either of them. I'm being put in the middle like crazy, especially here recently. They throw snide comments back and forth,  and they're so rude to each other. I feel like my roomie is wanting me to take a side, but I don't have one.
The worst part about this situation is that we're all living together next year, and my roomie and suit-mate were supposed to live together, but they can't get along so my roomie now wants her and I to live together. So now the news has to be broke to our suite-mate... I hate this so much :( I'm not a hateful person; I don't hold grudges or judge anyone. I don't feel comfortable being rude to anyone no matter what the issue is. If there is conflict I avoid it!! We need to make a decision by this week on how to bring up the topic to suite-mate; but honestly the only things that we (roomie) has come up with are kind of mean and I don't want to be pointing fingers. I think that maybe I should just talk to suite-mate myself and break the news to her, cause I just don't want her and roomie to get into it. It upsets me so much that this is happening, but suit-mate will still be living with us; just either by herself or with a stranger. I just know feelings are going to be hurt; but I honestly think the best option is to talk to suite-mate myself and maybe explain the situation. :(

Bah, in other news (I hate that so much is going on emotionally right now) A guy that I was talking to but told me that he didn't want a girlfriend told me today that he is in a relationship with one of my friends. :'( I really got attached to this guy, first time I've let my walls down in a very long time and this happens. I told him I was happy for him and walked away. I couldn't handle it. I have no one to talk to (that I want to talk to at that) I just don't know.. I can't wait for school to be over so I don't have to be around this or worry about guys or anything.
I hope all is well with you. I hear that part of the school is going to the Hunger Games on Friday. I am going to the midnight premiere tomorrow night and am incredibly pumped for it. They are amazing books :)