Ask buckems!

There's a 'rock event' (like a disco but with rock music) that goes on in my town every month or so, and most of my mates go to it. Out of the seven of us, five go (I don't). This place has a really bad rep. and most people who go there drink, smoke and do drugs, but of course my friends parents have NO IDEA about this. All of my five friends who go have gotten into smoking, and two of them are serious binge drinkers. One guy I know but am not great friends with also goes to this place and has gotten into illegal drugs, as has one girl I was kinda 'hi in the hallway' friends with, and she got expelled and charged by the police for it. Now my problem is, I will NOT stand by and watch my friends slowly kill themselves with a load of alcohol, drugs and cigarettes, but how can I stop them? I can't say anything about how dangerous it is because that's like preaching and they know the dangers but don't care. I am thinking of breaking friends with them...three of them are moving into my house in a couple of months and I have told the two of them moving in with me that smoke and drink that they can forget moving in if they think they can smoke in my house and they just laughed. I don't want to preach and I know if they don't want to stop I can't make them...but what do you think I should do? I am NOT standing by and watching them die. There's also the added problem that I am extremely asthmatic and being in a house with smokers would (I've checked this with a doctor) kill me within a month, but my friends won't listen to this either. I love them all loads but I am not putting up with this any more and I am not putting my life on the line because they are too selfish to stop smoking. CAN I make them see sense? Or should I just break friends and move on?
Thanks!!

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