Thanks (to some of you) for your responses, but I find the majority of them to be rather cold-hearted. I'm not just assuming out of thin air that she is unhappy. What you people don't know, is that when she drinks, she is honest, and tells me how much she HATES him. She even tells HIM how much of an asshole he is. She screams, cries, vents, and then the next day she denies ever saying it and pretends everything is peachy keen. DRUNKEN WORDS ARE SOBER THOUGHTS.
Not only that, I can tell by her demeanor that she is suffering verbal abuse, and I can hear him yelling at her in their bedroom through my bathroom wall. I know everything is NOT okay, but she is too submissive to ask for help or confront the issue. You people are assholes if you'd sit by and watch your roommate be abused and just turn the other way.