friendship/rumors

A friend of mine has been acting strange recently and I found out that she had brought alcohol into her dorm ( I attend a small boarding school) when a teacher found out she asked me about it, and since I am at the school on a scholarship I couldn't lie or else I would get kicked out. My friend got rid of the alcohol, but now her and all my other close friends hate me. I don't really know what to do. I have a few people who have told me that I did the right thing, but it doesn't feel like it. I really need some advice on what to do.