My current roommate is graduating this spring, so I had arranged to live with one of my new sorority sisters. Everything was great and we got along wonderfully (we're sisters, for cryin' out loud), until I learned something new about her.  She was excited about her new relationship with this guy, and I asked who it was, and she told me, not realizing that I was with him last semester. He stopped speaking to me this semester (unless it's to tell me that he hates me) and now that she knows the two of us had some kind of fling, we haven't really spoken in weeks either. It's quite an awkward situation.. I don't have feelings for him or anything, but I suspect that he may be telling her things about me that aren't true. He actually has a girlfriend and has told my sister that their "relationship" needs to be a secret (but at a school this size, of course it isn't).  I've heard that she thinks summer will heal all wounds and we'll be fine in the fall, but I'm a little bit worried about it. Maybe I should attempt to find another place to live? I don't really think there are any, but.. I could search? I don't know! She's my sister and I love her, but I don't know what to do about this.