Wow…I would start out by telling her that “I was really worried about how my room mate situation would turn out but from the beginning it’s been wonderful. I enjoyed our conversations, and felt like I really had a friend (just as you said). I hope you feel the same way. I take friendship seriously and want ours to be an honest one and because of that I have to share something with you. I don’t want to be the kind of friend who smiles in your face and talks behind your back so maybe no one has ever told you this before but I have noticed that you have an odor and I want to help you get to the root of it. It appears to be coming from your drawers but I also smell it when you walk by also. Others have noticed it too.” It’s going to be awkward no matter how it’s said but if it continues you may get angry and it may not come out as nice. Good luck.