So I live with a few guys, all of them are my friends and have been for some time. Recently one of them, (we'll call him fred for fun) has started dating a girl I know, but am not terribly close to. This girl is very good friends with another of my housemates (we'll call him george) which is great because shes around a lot. Fred is a nice guy, but hes a drug addict to say the least, and he is possibly the most self centered person I know. He is very involved in rehab and trying to get back on track with things, but we all know he doesnt really want to. He has all sorts of plans and absolutely no intention of following through. He recently has been talking to me about his relationship with this girl, and he clearly sees her as no more than a sex object and is quite open with this fact. I didnt care at first, I mean it doesnt affect me and its none of my business so I kept quiet about it. This girl however, has recently decided she wants to be best friends with me because Fred, George and I are so close. The more I get to know this girl the more guilty I feel about my knowledge. She is absolutely smitten with Fred and has no clue that hes totally using her. George keeps telling me how happy he is that this girl has finally found someone who cares about her etc. Fred would never talk to George the way he talks to me. Part of me feels like I need to say something, but I dont want to be the one to break her heart. I tried to tell Fred he needs to be honest with this girl or hes going to hurt her but he figures hes got a really good thing and he doesnt want to mess with it. When the S*** hits the fan I know everyones going to be mad at everyone and Im sort of stuck on how to handle this situation.